EP4732633A1 - Tunable red green blue lights - Google Patents

Abstract

A red, green, and blue (RGB) light module includes a first light emitting diode (LED) light source configured to provide an adjustable red light including a main red light. The adjustable red light is adjustable to further include a first amber light or a deep red light. The RGB light module further includes a second LED light source configured to provide an adjustable green light including a main green light. The adjustable green light is adjustable to further include a second amber light or a first cyan light. The RGB light module also includes a third LED light source configured to provide an adjustable blue light including a main blue light. The adjustable blue light is adjustable to further include a second cyan light or a blue adjustment light. Via a controller, the adjustable red light is adjustable based on a first control input by providing current to the first amber light or the deep red light but not to both at the same time, the adjustable green light is adjustable based on a second control input by providing current to the second amber light or the first cyan light but not to both at the same time, and the adjustable blue light is adjustable based on a third control input by providing current to the second cyan light or the blue adjustment light but not to both at the same time.

Description

TUNABLE RED GREEN BLUE LIGHTS

FIELD OF THE INVENTION

The present disclosure relates generally to lighting solutions, and more particularly to providing tunable red, green, and blue (RGB) lights.

BACKGROUND

RGB lights are generally high in purity and highly saturated and thus are desirable in some applications. Typically, an RGB light fixture provides RGB lights (i.e., a red light, a green light, and a blue light) that each have a fixed wavelength. In some cases, the colors of RGB lights provided by an RGB light fixture may satisfactorily match desired RGB colors in one application. However, in another application, the exact color(s) of one or more of the RGB lights may not satisfactorily match desired RGB color(s). For example, the color of the red light provided by an RGB light fixture may satisfactorily match the red color of a first company’s logo but may not satisfactorily match the red color of another company’s logo. As another example, the color(s) of one or more RGB lights provided by an RGB light fixture may satisfactorily match one or more colors (e.g., green) of one flag but may not satisfactorily match one or more colors (e.g., blue) of another flag. Obtaining an RGB light fixture that provides RGB lights that satisfactorily match desired RGB colors in different applications may be challenging. Thus, a solution that provides tunable RGB lights may be desirable.

SUMMARY OF THE INVENTION

The present disclosure relates generally to lighting solutions, and more particularly to providing tunable RGB lights. In an example embodiment, an RGB light module includes a first light emitting diode (LED) light source configured to provide an adjustable red light including a main red light. The adjustable red light is adjustable to further include a first amber light or a deep red light. The RGB light module further includes a second LED light source configured to provide an adjustable green light including a main green light. The adjustable green light is adjustable to further include a second amber light or a first cyan light. The RGB light module also includes a third LED light source configured to provide an adjustable blue light including a main blue light. The adjustable blue light is adjustable to further include a second cyan light or a blue adjustment light that may be a royal blue light, a violet light, or a mix of royal blue light and violet light.

In some another example embodiment, an RGB light fixture includes a main driver and an RGB light module. The RGB light module includes a first light emitting diode (LED) light source configured to provide an adjustable red light including a main red light, where the adjustable red light is adjustable such that the adjustable red light further includes a first amber light or a deep red light. The RGB light module further includes a second LED light source configured to provide an adjustable green light including a main green light, where the adjustable green light is adjustable such that the adjustable green light further includes a second amber light or a first cyan light. The RGB light module also includes a third LED light source configured to provide an adjustable blue light including a main blue light, where the adjustable blue light is adjustable such that the adjustable blue light further includes a second cyan light or a blue adjustment light that may be a royal blue light, a violet light, or a mix of royal blue light and violet light. The main driver is configured to provide power to the first LED light source, the second LED light source, and the third LED light source.

These and other aspects, objects, features, and embodiments will be apparent from the following description and the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

Reference will now be made to the accompanying drawings, which are not necessarily drawn to scale, and wherein:

FIG. 1 illustrates an RGB lighting device including an RGB light module according to an example embodiment;

FIG. 2 illustrates an RGB lighting device including an RGB light module according to another example embodiment;

FIG. 3 illustrates an RGB lighting device including an RGB light module according to another example embodiment;

FIG. 4 illustrates an RGB lighting device including an RGB light module according to another example embodiment;

FIG. 5 illustrates a chromaticity chart of the RGB lights provided by the RGB light module of FIG. 1 according to an example embodiment; and

FIG. 6 illustrates a chromaticity chart of the RGB lights provided by the RGB light module of FIG. 3 according to another example embodiment. The drawings illustrate only example embodiments and are therefore not to be considered limiting in scope. The elements and features shown in the drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the example embodiments. Additionally, certain dimensions or placements may be exaggerated to help visually convey such principles. In the drawings, the same reference numerals used in different figures may designate like or corresponding and not necessarily identical elements.

DETAILED DESCRIPTION

In the following paragraphs, example embodiments will be described in further detail with reference to the figures. In the description, well known components, methods, and/or processing techniques are omitted or briefly described. Furthermore, reference to various feature(s) of the embodiments is not to suggest that all embodiments must include the referenced feature(s).

FIG. 1 illustrates an RGB lighting device 100 including an RGB light module 102 according to an example embodiment. In some example embodiments, the RGB lighting device 100 may include the RGB light module 102 and a main driver 104 that provides power to the RGB light module 102. For example, the main driver 104 may be an LED driver that receives alternating current (AC) power and that provides direct current (DC) power to the light module 102. For example, the main driver 104 may be a constant current driver.

In some example embodiments, the RGB light module 102 may include a tuning driver 106 that includes a controller 108 that controls the power provided by the tuning driver 106. For example, the tuning driver 106 may be configured based on user inputs provided via a user control interface 110 (e.g., a touchpad, a keypad, graphic user interface, etc.) of the RGB light module 102. The RGB light module 102 may also include a first LED light source 112, a second LED light source 114, and a third LED light source 116. The first LED light source 112, the second LED light source 114, and the third LED light source 116 may each include a respective printed circuit board with respective LEDs positioned thereon. Alternatively, the first LED light source 112, the second LED light source 114, and the third LED light source 116 may each be directly attached to a heat sink. The first LED light source 112 may output an adjustable red light 118. For example, the adjustable red light 118 may have a dominant wavelength in a range of 600 nm to 650 nm. The second LED light source 114 may output an adjustable green light 120. For example, the adjustable green light 120 may have a dominant wavelength in a range of 510 nm to 550 nm. The third LED light source 116 may output an adjustable blue light 122. For example, the adjustable blue light 122 may have a dominant wavelength in a range of 460 nm to 485 nm based on a control input. The beam directions of the adjustable red light 118, the adjustable green light 120, and the adjustable blue light 122 may be controlled to point toward the same target area or different target areas from each other.

In some example embodiments, the first LED light source 112 may include LEDs 124 that emit main red light 142, LEDs 126 that emit deep red light 144, and LEDs 128 that emit amber light 146. For example, the main red light 142 may have a peak wavelength in a range of 615 nm to 650 nm. The deep red light 144 may have a peak wavelength in a range of 665 nm to 675 nm. The amber light 146 may have a peak wavelength in a range of 590 nm to 605 nm.

In some example embodiments, the second LED light source 114 may include LEDs 130 that emit main green light 148, LEDs 132 that emit amber light 150, and LEDs 134 that emit cyan light 152. For example, the main green light 148 may have a peak wavelength in a range of 520 nm to 530 nm. The amber light 150 may have a peak wavelength in a range of 590 nm to 605 nm. The cyan light 152 may have a peak wavelength in a range of 500 nm to 520 nm.

In some example embodiments, the third LED light source 116 may include LEDs 136 that emit main blue light 154, LEDs 138 that emit cyan light 156, and LEDs 140 that emit a blue adjustment light 158. For example, the main blue light 154 may have a peak wavelength in a range of 465 nm to 480 nm. The cyan light 156 may have a peak wavelength in a range of 500 nm to 520 nm. The blue adjustment light 158 may be royal blue light having a peak wavelength in a range of 445 nm to 455 nm. Alternatively, the blue adjustment light 158 may be violet light having a peak wavelength in a range of 400 nm to 410 nm. Alternatively, the blue adjustment light 158 may be a combination of royal blue light and violet light and may have a peak wavelength in a range of 435 nm to 450 nm.

In some example embodiments, the main driver 104 provides power to the LEDs 124 that emit the main red light 142. The main driver 104 may also provide power to the LEDs 130 that emit the main green light 148 and to the LEDs 136 that emit the main blue light 154. For example, the main driver 104 may receive alternating current (AC) input power and may provide, for example, a direct current (DC) power compatible with the LEDs 124, 130, 136. To illustrate, the main driver 104 may be an LED driver that serves as a constant current source to the LEDs 124, 130, 136. The main driver 104 may be controllable to adjust the current provided to each one of the LEDs 124, the LEDs 130, and the LEDs 136. For example, the main driver 104 may be controllable to individually cut off current from each of the LEDs 124, the LEDs 130, and the LEDs 136 to turn off the main red light 142, the main green light 148, and the main blue light 154, respectively.

In some example embodiments, the main driver 104 may also provide auxiliary power to the tuning driver 106 via an electrical connection 160 (e.g., one or more wires). The tuning driver 106 may provide power to some LEDs of the first LED light source 112, the second LED light source 114, and the third LED light source 116 based on the auxiliary power received from the main driver 104. For example, the tuning driver 106 may include a DC-DC converter (e.g., a multi-channel DC-DC converter) that receives the auxiliary power and outputs power that is compatible with some of the LEDs of the first LED light source 112, the second LED light source 114, and the third LED light source 116. The controller 108 may also include a microcontroller and a memory device (e.g., a flash memory) to perform operations described herein with respect to the controller 108.

In some example embodiments, the tuning driver 106 may provide power to the LEDs 126 and the LEDs 128 of the first LED light source 112 generated by a DC-DC converter from the auxiliary power provided by the main driver 104. The tuning driver 106 may also provide power to the LEDs 132 and the LEDs 134 of the second LED light source 114. The tuning driver 106 may also provide power to the LEDs 138 and the LEDs 140 of the third LED light source 116.

In some example embodiments, with respect to the first LED light source 112, the tuning driver 106 may provide power to the LEDs 126 that emit deep red light 144 or to the LEDs 128 that emit amber light 146 based on control inputs. That is, with respect to the first LED light source 112, the tuning driver 106 may provide power either to the LEDs 126 or to the LEDs 128 but not to both at the same time. The control inputs may be provided to the tuning driver 106 such that the adjustable red light 118 provided by the first LED light source 112 has a desired shade of red. To illustrate, depending on control inputs received by the controller 108 via the user control interface 110, the adjustable red light 118 provided by the first LED light source 112 may be strictly the main red light 142 provided by the LEDs 124, a combination of the main red light 142 and the deep red light 144 provided by the LEDs 126, or a combination of the main red light 142 and the amber light 146 provided by the LEDs 128.

In some example embodiments, the adjustable red light 118 may be tuned based on control inputs. To illustrate, during a light tuning process, a user may provide control inputs to the controller 108 via the user control interface 110 to tune the adjustable red light 118 until the adjustable red light 118 closely matches a desired red light. For example, during the tuning process, a user may compare the color of the adjustable red light 118 provided by the first LED light source 112 against a desired red color to determine whether the color of the adjustable red light 118 closely matches the desired red color. The user may iteratively provide control inputs to the tuning driver 106 via the user control interface 110 and compare the resulting color of the adjustable red light 118 against the desired red color until the color of the adjustable red light 118 closely matches the desired red color.

For example, if the adjustable red light 118 is desired to be a deeper red light than the main red light 142, the user may provide control inputs to the controller 108 to turn off or keep off the amber light 146 and to adjust the intensity of the deep red light 144 until the color of the adjustable red light 118 closely matches a desired shade of deep red. To illustrate, based on one or more control inputs, the controller 108 may increase the intensity of the deep red light 144 to make the adjustable red light 118 a deeper red light. Based on one or more control inputs, the controller 108 may decrease the intensity of the deep red light 144 to make the adjustable red light 118 less deep red but still a deeper red than the main red light 142. As another example, based on one or more control inputs, the controller 108 may turn off both the deep red light 144 and the amber light 146, for example, if the main red light 142 closely matches the desired color of the adjustable red light 118.

In some example embodiments, if the adjustable red light 118 is desired to be a lighter red light than the main red light 142, the user may provide control inputs to the controller 108 to turn off or keep off the deep red light 144 and to adjust the intensity of the amber light 146 until the color of the adjustable red light 118 closely matches a desired shade of lighter red. To illustrate, based on one or more control inputs, the controller 108 may increase the intensity of the amber light 146 to make the adjustable red light 118 a lighter red light. Based on one or more control inputs, the controller 108 may decrease the intensity of the amber light 146 to make the adjustable red light 118 less lighter red but still a lighter red than the main red light 142. In general, the amber light 146 may be off when the deep red light 144 is on, and the deep red light 144 may be off when the amber light 146 is on.

In some example embodiments, the controller 108 may turn off the deep red light 144 by cutting off the current provided by the tuning driver 106 to the LEDs 126, and the controller 108 may turn off the amber light 146 by cutting off the current provided by the tuning driver 106 to the LEDs 128. To adjust the intensity of the deep red light 144 based on control inputs received via the user control interface 110, the controller 108 may adjust the current provided by the tuning driver 106 to the LEDs 126. For example, the controller 108 may adjust up and down the duty cycle of a pulse width modulation (PWM) electrical signal provided to the LEDs 126 to increase and decrease, respectively, the average current flowing through the LEDs 126. To adjust the intensity of the amber light 146 based on control inputs received via the user control interface 110, the controller 108 may adjust the current provided by the tuning driver 106 to the LEDs 128. For example, the controller 108 may adjust up and down the duty cycle of a PWM electrical signal provided to the LEDs 128 to increase and decrease, respectively, the average current flowing through the LEDs 128. In general, with respect to the first LED light source 112, current is provided by the tuning driver 106 to either the LEDs 126 or to the LEDs 128 but not to both at the same time.

In some example embodiments, a user may visually compare the adjustable red light 118 against a desired red color to determine whether the adjustable red light 118 has the desired shade of red and may provide control inputs to the tuning driver 106 as needed. Alternatively, a user may use an instrument (e.g., an optical spectrometer) to determine, for example, whether the adjustable red light 118 has a dominant wavelength in a range of 600 nm to 650 nm and may provide control inputs to the tuning driver 106 as needed. The control inputs that result in the adjustable red light 118 having the desired shade of red may be saved, for example, as a red light setting such that the first LED light source 112 outputs the adjustable red light 118 having the desired shade of red based on the setting during normal operation. For example, the red light setting may be stored in a memory device of the controller 108.

In some example embodiments, a user may provide a reset input via the user control interface 110 that results in the red light setting having a default values. For example, the default value of the red light setting may correspond to the main red light 142 being on and the deep red light 144 and the amber light 146 being off.

In some example embodiments, with respect to the second LED light source 114, the tuning driver 106 may provide power to the LEDs 132 that emit amber light 150 or to the LEDs 134 that emit cyan light 152 based on control inputs. That is, with respect to the second LED light source 114, the tuning driver 106 may provide power either to the LEDs 132 or to the LEDs 134 but not to both at the same time. The control inputs may be provided to the tuning driver 106 such that the adjustable green light 120 provided by the second LED light source 114 has a desired shade of green. To illustrate, depending on control inputs received by the controller 108 via the user control interface 110, the adjustable green light 120 provided by the second LED light source 114 may be strictly the main green light 148 provided by the LEDs 130, a combination of the main green light 148 and the amber light 150 provided by the LEDs 132, or a combination of the main green light 148 and the cyan light 152 provided by the LEDs 134.

In some example embodiments, the adjustable green light 120 may be tuned based on control inputs. To illustrate, during a light tuning process, a user may provide control inputs to the controller 108 via the user control interface 110 to tune the adjustable green light 120 until the adjustable green light 120 closely matches a desired green light. For example, during the tuning process, a user may compare the color of the adjustable green light 120 provided by the second LED light source 114 against a desired green color to determine whether the color of the adjustable green light 120 closely matches the desired green color. The user may iteratively provide control inputs to the tuning driver 106 via the user control interface 110 and compare the resulting color of the adjustable green light 120 against the desired green color until the color of the adjustable green light 120 closely matches the desired green color.

For example, if the adjustable green light 120 is desired to be yellowish compared to the main green light 148, the user may provide control inputs to the controller 108 to turn off or keep off the cyan light 152 and to adjust the intensity of the amber light 150 until the color of the adjustable green light 120 closely matches a desired yellowish shade of green. To illustrate, based on one or more control inputs, the controller 108 may increase the intensity of the amber light 150 to make the adjustable green light 120 a yellowish green light. To make the adjustable green light 120 less yellowish green but still more yellowish than the main green light 148 based on one or more control inputs, the controller 108 may decrease the intensity of the amber light 150. As another example, based on one or more control inputs, the controller 108 may turn off both the amber light 150 and the cyan light 152, for example, if the main green light 148 closely matches the desired color of the adjustable green light 120.

In some example embodiments, if the adjustable green light 120 is desired to be a bluish green light compared to the main green light 148, the user may provide control inputs to the controller 108 to turn off or keep off the amber light 150 and to adjust the intensity of the cyan light 152 until the color of the adjustable green light 120 closely matches a desired bluish shade of green. To illustrate, based on one or more control inputs, the controller 108 may increase the intensity of the cyan light 152 to make the adjustable green light 120 a bluish green light. Based on one or more control inputs, the controller 108 may decrease the intensity of the cyan light 152 to make the adjustable green light 120 less bluish green but still more bluish than the main green light 148. In general, the amber light 150 may be off when the cyan light 152 is on, and the cyan light 152 may be off when the second amber light 150 is on.

In some example embodiments, the controller 108 may turn off the amber light 150 by cutting off the current provided by the tuning driver 106 to the LEDs 132, and the controller 108 may turn off the cyan light 152 by cutting off the current provided by the tuning driver 106 to the LEDs 134. To adjust the intensity of the amber light 150 based on control inputs received via the user control interface 110, the controller 108 may adjust the current provided by the tuning driver 106 to the LEDs 132. For example, the controller 108 may adjust up and down the duty cycle of a PWM electrical signal provided to the LEDs 132 to increase and decrease, respectively, the average current flowing through the LEDs 132. To adjust the intensity of the cyan light 152 based on control inputs received via the user control interface 110, the controller 108 may adjust the current provided by the tuning driver 106 to the LEDs 134. For example, the controller 108 may adjust up and down the duty cycle of a PWM electrical signal provided to the LEDs 134 to increase and decrease, respectively, the average current flowing through the LEDs 134. In general, with respect to the second LED light source 114, the tuning driver 106 provides current to either the LEDs 132 or to the LEDs 134 but not to both at the same time.

In some example embodiments, a user may visually compare the adjustable green light 120 against a desired green color to determine whether the adjustable green light 120 has the desired shade of green and may provide control inputs to the tuning driver 106 as needed. Alternatively, a user may use an instrument (e.g., an optical spectrometer) to determine, for example, whether the adjustable green light 120 has a dominant wavelength in a range of 510 nm to 550 nm and may provide control inputs to the tuning driver 106 as needed. The control inputs that result in the adjustable green light 120 having the desired shade of green may be saved, for example, as a green light setting such that the second LED light source 114 outputs the adjustable green light 120 having the desired shade of green based on the setting during normal operation. For example, the green light setting may be stored in a memory device of the controller 108.

In some example embodiments, a user may provide a reset input via the user control interface 110 that results in the green light setting having a default values. For example, the default value of the green light setting may correspond to the main green light 148 being on and the amber light 150 and the cyan light 152 being off.

In some example embodiments, with respect to the third LED light source 116, the tuning driver 106 may provide power to the LEDs 138 that emit cyan light 156 or to the LEDs 140 that emit blue adjustment light 158 based on control inputs. That is, with respect to the third LED light source 116, the tuning driver 106 may provide power either to the LEDs 138 or to the LEDs 140 but not to both at the same time. The control inputs may be provided to the tuning driver 106 such that the adjustable blue light 122 provided by the third LED light source 116 has a desired shade of blue. To illustrate, depending on control inputs received by the controller 108 via the user control interface 110, the adjustable blue light 122 provided by the third LED light source 116 may be strictly the main blue light 154 provided by the LEDs 136, a combination of the main blue light 154 and the cyan light 156 provided by the LEDs 138, or a combination of the main blue light 154 and the blue adjustment light 158 provided by the LEDs 140. For example, the blue adjustment light 158 may be a royal blue light, a violet light, or a preset mix of royal blue and violet lights.

In some example embodiments, the adjustable blue light 122 may be tuned based on control inputs. To illustrate, during a light tuning process, a user may provide control inputs to the controller 108 via the user control interface 110 to tune the adjustable blue light 122 until the adjustable blue light 122 closely matches a desired blue light. For example, during the tuning process, a user may compare the color of the adjustable blue light 122 provided by the third LED light source 116 against a desired blue color to determine whether the adjustable blue light 122 closely matches the desired blue light. The user may iteratively provide control inputs to the tuning driver 106 via the user control interface 110 and compare the color of the adjustable blue light 122 against the desired blue color until the color of the adjustable blue light 122 closely matches the desired blue color.

For example, if the adjustable blue light 122 is desired to be a lighter blue light than the main blue light 154, the user may provide control inputs to the controller 108 to turn off or keep off the blue adjustment light 158 and to adjust the intensity of the cyan light 156 until the color of the adjustable blue light 122 closely matches a desired shade of lighter blue. To illustrate, based on one or more control inputs, the controller 108 may increase the intensity of the cyan light 156 to make the adjustable blue light 122 a lighter blue light. Based on one or more control inputs, the controller 108 may decrease the intensity of the cyan light 156 to make the adjustable blue light 122 less lighter blue but still lighter than the main blue light 154. As another example, based on one or more control inputs, the controller 108 may turn off both the cyan light 156 and the blue adjustment light 158, for example, if the main blue light 154 closely matches the desired color of the adjustable blue light 122.

In some example embodiments, if the adjustable blue light 122 is desired to be a darker blue light than the main blue light 154, the user may provide control inputs to the controller 108 to turn off or keep off the cyan light 156 and to adjust the intensity of the blue adjustment light 158 until the color of the adjustable blue light 122 closely matches a desired shade of darker blue. To illustrate, based on one or more control inputs, the controller 108 may increase the intensity of the blue adjustment light 158 to make the adjustable blue light 122 a darker blue light. Based on one or more control inputs, the controller 108 may decrease the intensity of the blue adjustment light 158 to make the adjustable blue light 122 less dark but still darker than the main blue light 154.

In some example embodiments, the controller 108 may turn off the cyan light 156 by cutting off the current provided by the tuning driver 106 to the LEDs 138, and the controller 108 may turn off the blue adjustment light 158 by cutting off the current provided by the tuning driver 106 to the LEDs 140. To adjust the intensity of the cyan light 156 based on control inputs received via the user control interface 110, the controller 108 may adjust the current provided by the tuning driver 106 to the LEDs 138. For example, the controller 108 may adjust up and down the duty cycle of aPWM electrical signal provided to the LEDs 138 to increase and decrease, respectively, the average current flowing through the LEDs 138. To adjust the intensity of the blue adjustment light 158 based on control inputs received via the user control interface 110, the controller 108 may adjust the current provided by the tuning driver 106 to the LEDs 140. For example, the controller 108 may adjust up and down the duty cycle of a PWM electrical signal provided to the LEDs 140 to increase and decrease, respectively, the average current flowing through the LEDs 140. In general, with respect to the third LED light source 116, current is provided by the tuning driver 106 to either the LEDs 138 or to the LEDs 140 but not to both at the same time. In general, the cyan light 156 may be off when the blue adjustment light 158 is on, and the blue adjustment light 158 may be off when the cyan light 156 is on.

In some example embodiments, a user may visually compare the adjustable blue light 122 against a desired blue color to determine whether the adjustable blue light 122 has the desired shade of blue and may provide control inputs to the tuning driver 106 as needed. Alternatively, a user may use an instrument (e.g., an optical spectrometer) to determine, for example, whether the adjustable blue light 122 has a dominant wavelength in a range of 460 nm to 485 nm and may provide control inputs to the tuning driver 106 as needed. The control inputs that result in the adjustable blue light 122 having the desired shade of blue may be saved, for example, as a blue light setting such that the third LED light source 116 outputs the adjustable blue light 122 having the desired shade of blue based on the setting during normal operation. For example, the blue light setting may be stored in a memory device of the controller 108.

In some example embodiments, a user may provide a reset input via the user control interface 110 that results in the blue light setting having a default values. For example, the default value of the blue light setting may correspond to the main blue light 154 being on and the cyan light 156 and the blue adjustment light 158 being off.

During operation, the RGB lighting device 100 may provide adjustable red light 118, the adjustable green light 120, or the adjustable blue light 122 that have colors that are set during the tuning process. By using the deep red light 144 or the amber light 146 with the main red light 142, the purity of the adjustable red light 118 can be maintained within an acceptable range of the purity of the main red light 142. By using the amber light 150 or the cyan light 152 with the main green light 148, the purity of the adjustable green light 120 can be maintained within an acceptable range of the purity of the main green light 148. By using the cyan light 156 or the blue adjustment light 158 (i.e., a royal blue light, a violet light, or a mix thereof) with the main blue light 154, the purity of the adjustable blue light 122 can be maintained within an acceptable range of the purity of the main blue light 154.

The adjustability of the adjustable red light 118, the adjustable green light 120, and the adjustable blue light 122 enables the RGB lighting device 100 to provide RGB lights that closely match respective desired colors. The adjustability of the adjustable red light 118, the adjustable green light 120, and the adjustable blue light 122 enables the RGB lighting device 100 to be used in different applications and can avoid the need for multiple different RGB light fixtures for different applications. The RGB lighting device 100 may be used to provide just one of the adjustable red light 118, the adjustable green light 120, and the adjustable blue light 122 at a particular time. Alternatively, the RGB lighting device 100 may be used to provide two or all three of the adjustable red light 118, the adjustable green light 120, and the adjustable blue light 122 at the same time. For example, the RGB lighting device 100 may illuminate a facade of a building with the adjustable red light 118, the adjustable green light 120, and/or the adjustable blue light 122.

In some alternative embodiments, the RGB lighting device 100 may include other components than shown without departing from the scope of this disclosure. In some alternative embodiments, the tuning driver 106 may be integrated into the main driver 104 without departing from the scope of this disclosure. In some alternative embodiments, the first, second, and third light sources 112, 114, 116 may each include more or fewer LEDs than shown without departing from the scope of this disclosure. In some alternative embodiments, the LEDs of the first, second, and third light sources 112, 114, 116 may be connected in different configurations than shown without departing from the scope of this disclosure.

FIG. 2 illustrates an RGB lighting device 200 including an RGB light module 202 according to another example embodiment. In some example embodiments, the RGB lighting device 200 may correspond to the RGB lighting device 100 of FIG. 1 with differences related to shared LEDs.

Referring to FIGS. 1 and 2, in some example embodiments, the RGB lighting device 200 of FIG. 2 may include the RGB light module 202 and the main driver 104 that provides power to the RGB light module 202. The RGB light module 202 may include the tuning driver 106 that includes the controller 108 that controls the power provided by the tuning driver 106, for example, based on control inputs received user control interface 110 as described above with respect to FIG.1 The RGB light module 202 may also include a first LED light source 204, a second LED light source 206, and a third LED light source 208. The first LED light source 204, the second LED light source 206, and the third LED light source 208 may each include a respective printed circuit board with respective LEDs positioned thereon.

In some example embodiments, the first LED light source 204 may output an adjustable red light 210 For example, the adjustable red light 210 may have a dominant wavelength in a range of 600 nm to 650 nm. The adjustable red light 210 may correspond to the adjustable red light 118 described above with respect to FIG. 1. The second LED light source 206 may output an adjustable green light 212. For example, the adjustable green light 212 may have a dominant wavelength in a range of 510 nm to 550 nm. The adjustable green light 212 may correspond to the adjustable green light 120 described above with respect to FIG. 1. The third LED light source 208 may output an adjustable blue light 214. For example, the adjustable blue light 214 may have a dominant wavelength in a range of 460 nm to 485 nm based on a control input. The adjustable blue light 214 may correspond to the adjustable blue light 122 described above with respect to FIG. 1.

In some example embodiments, the first LED light source 204 of the RGB light module 202 may include the LEDs 124 and the LEDs 126 described above with respect to FIG. 1. The LEDs 124 may emit the main red light 142, and the LEDs 126 may emit the deep red light 144. The first LED light source 204 may also include LEDs 216 that emit amber light 220. The tuning driver 106 may provide power to the LEDs 216 in the manner described above with respect to the LEDs 128 and FIG. 1. The amber light 220 may correspond to each of the amber light 146 and the amber light 150 described above with respect to FIG. 1. The second LED light source 206 of the RGB light module 202 may include LEDs 130 that emit the main green light 148 described above with respect to FIG. 1. The second LED light source 206 may also include the LEDs 216 that emit the amber light 220 and LEDs 218 that emit cyan light 222. The cyan light 222 may correspond to each of the cyan light 152 and the cyan light 156 described above with respect to FIG. 1. The third LED light source 208 of the RGB light module 202 may include LEDs 136 that emit the main blue light 154 and the LEDs 140 that emit the blue adjustment light 158 as described above with respect to FIG. 1. The third LED light source 208 may also include the LEDs 218 that emit the cyan light 222. In general, the tuning driver 106 may provide power to the LEDs 126, 216, 218, 140, and the main driver 104 may provide power to the LEDs 124, 130, 136 in the manner described above with respect to FIG. 1.

As shown in FIG. 2, the first LED light source 204 and the second LED light source 206 share the LEDs 216 that emit the amber light 220, and the second LED light source 206 and the third LED light source 208 share the LEDs 218 that emit the cyan light 222. The light source 204 may provide the adjustable red light 210 that may be strictly the main red light 142, a combination of the main red light 142 and the deep red light 144 provided by the LEDs 126, or a combination of the main red light 142 and the amber light 220 provided by the LEDs 216. The light source 206 may provide the adjustable green light 212 that may be strictly the main green light 148 provided by the LEDs 130, a combination of the main green light 148 and the amber light 220 provided by the LEDs 216, or a combination of the main green light 148 and the cyan light 222 provided by the LEDs 218. That is, the amber light 220 may be off when the cyan light 222 is on, and the cyan light 222 may be off when the amber light 220 is on. The light source 208 may provide the adjustable blue light 214 that may be strictly the main blue light 154 provided by the LEDs 136, a combination of the main blue light 154 and the cyan light 222 provided by the LEDs 218, or a combination of the main blue light 154 and the blue adjustment light 158 provided by the LEDs 140. For example, the blue adjustment light 158 may be a royal blue light, a violet light, or a preset mix of royal blue and violet lights.

In some example embodiments, during a tuning process, the adjustable red light 210, the adjustable green light 212, and the adjustable blue light 214 may each be tuned to match a desired color as described above with respect to the adjustable red light 118, the adjustable green light 120, and the adjustable blue light 122 in FIG. 1. To illustrate, a user may provide control inputs to the tuning driver 106 via the user control interface 110 to individually adjust each of the adjustable red light 210, the adjustable green light 212, and the adjustable blue light 214. For example, a user may provide control inputs to the tuning driver 106 via the user control interface 110 until the color of the adjustable red light 210 closely matches a desired shade of red. A user may provide control inputs to the tuning driver 106 via the user control interface 110 until the color of the adjustable green light 212 closely matches a desired shade of green. A user may provide control inputs to the tuning driver 106 via the user control interface 110 until the color of the adjustable blue light 212 closely matches a desired shade of blue. The control inputs that result in the desired colors with respect to each one of the adjustable red light 210, the adjustable green light 212, and the adjustable blue light 214 may be saved for as settings for use during the operation of the RGB lighting device 200.

In some example embodiments, a user may provide a reset input via the user control interface 110 that results in each one of the adjustable red light 210, the adjustable green light 212, and the adjustable blue light 214 having a respective default color.

During operation, the RGB lighting device 200 may provide adjustable red light 210, the adjustable green light 212, or the adjustable blue light 214 that have colors that are set during the tuning process. Because the LEDs 216 are shared by the LED light sources 204, 206 and because the LEDs 218 are shared by the LED light sources 206, 208, in some example embodiments, the RGB light module 202, and thus the RGB lighting device 200, may be used to provide the adjustable red light 210, the adjustable green light 212, or the adjustable blue light 214 but not all three at the same time.

In some alternative embodiments, the RGB lighting device 200 may include other components than shown without departing from the scope of this disclosure. In some alternative embodiments, the first, second, and third light sources 204, 206, 208 may each include more or fewer LEDs than shown without departing from the scope of this disclosure. In some alternative embodiments, the LEDs of the first, second, and third light sources 204, 206, 208 may be connected in different configurations than shown without departing from the scope of this disclosure.

FIG. 3 illustrates an RGB lighting device 300 including an RGB light module 320 according to another example embodiment. In some example embodiments, the RGB lighting device 300 corresponds to the RGB lighting device 100 of FIG. 1 with the addition of a fourth LED light source 302. To illustrate, the RGB lighting device 300 may include the RGB light module 320 and the main driver 104. The RGB light module 320 may include the tuning driver 106, the first LED light source 112, the second LED light source 114, and the third LED light source 116 described above with respect to FIG. 1. The first LED light source 112 provides the adjustable red light 118, the second LED light source 114 provides the adjustable green light 120, and the third LED light source 116 provides the adjustable blue light 122.

In some example embodiments, the fourth LED light source 302 may be used to provide a second adjustable blue light 310 as an alternative to the adjustable blue light 122 described above with respect to FIG. 1. To illustrate, the adjustable blue light 122 may be the main blue light 154, a combination of the main blue light 154 and the blue adjustment light 158 and violet lights, or a combination of the main blue light 154 and the blue light 156. As described above, the blue adjustment light 158 may be a royal blue light, a violet light, or a preset mix of royal blue. In contrast, the second adjustable blue light 310 provided by the fourth LED light source 302 may be strictly a main royal blue light 312, a combination of the main royal blue light 312 and a blue light 314, or a combination of the main royal blue light 312 and a violet light 316. The main royal blue light 312 may have a peak wavelength in a range of 445 nm to 455 nm. The blue light 314 may have a peak wavelength in a range of 470 nm to 480 nm. The violet light 316 may have a peak wavelength in a range of 400 nm to 410 nm.

In some example embodiments, the fourth LED light source 302 may include LEDs 304 that emit the main royal blue light 312. The fourth LED light source 302 may include LEDs 306 that provide the cyan light 314 and LEDs 308 that provide the violet light 316. The main driver 104 may provide power to the LEDs 304, and the tuning driver 106 may provide power to the LEDs 306 and the LEDs 308.

In some example embodiments, during a tuning process, a user may iteratively provide control inputs to the tuning driver 106 via the user control interface 110 to adjust the second adjustable blue light 310 until the color of the second adjustable blue light 310 closely matches a desired blue color. For example, a combination of the main royal blue light 312 and the blue light 314 may have a lighter blue color than the main royal blue light 312. As another example, a combination of the main royal blue light 312 and the violet light 316 may have a darker blue color than the main royal blue light 312. To be clear, the blue light 314 and the violet light 316 are not emitted or otherwise combined with the main royal blue light 312 at the same time. The control inputs that result in the second adjustable blue light 310 having a color that closely matches the desired shade of blue may be saved as a royal blue setting and may be used during the operation of the RGB lighting device 300 to provide the second adjustable blue light 310. In some example embodiments, a user may provide a reset input via the user control interface 110 that results in each one of the second adjustable blue light 310 having a default color.

In some example embodiments, the RGB lighting device 300 may provide either the adjustable blue light 122 or the adjustable blue light 310 depending on the desired shade of blue color. For example, when a user wants a blue light that is darker than the adjustable blue light 122 can be, the RGB lighting device 300 may provide the adjustable blue light 310. The user may provide a selection input, for example, via the user control interface 110 or another interface to indicate whether the user wants the adjustable blue light 122 or the adjustable blue light 310. Upon a reset input provided to the RGB lighting device 300, either the adjustable blue light 122 or the adjustable blue light 310 may be selected by default.

In some alternative embodiments, the RGB lighting device 300 may include other components than shown without departing from the scope of this disclosure. In some alternative embodiments, the first, second, third, and fourth light sources 112, 114, 116, 302 may each include more or fewer LEDs than shown without departing from the scope of this disclosure. In some alternative embodiments, the LEDs of the first, second, third, and fourth light sources 112, 114, 116, 302 may be connected in different configurations than shown without departing from the scope of this disclosure.

FIG. 4 illustrates an RGB lighting device 400 including an RGB light module 410 according to another example embodiment. In some example embodiments, the RGB lighting device 400 corresponds to the RGB lighting device 100 FIG. 1 where the primary difference is related to the auxiliary power provided to the tuning driver 106. In some example embodiments, the RGB lighting device 400 includes the main driver 104 and the RGB light module 410. The RGB light module 410 includes the tuning driver 106 that includes the controller 108 as described above with respect to FIG. 1. The RGB light module 410 further includes the LEDs 124, the LEDs 130, and the LEDs 136 that emit the main red light 142, the main green light 148, and the main blue light 154, respectively, as described above with respect to FIG. 1.

In some example embodiments, the RGB light module 410 includes the LEDs 126 and the LEDs 128 that together with LEDs 124 correspond to the first LED light source 112 of FIG. 1 that provides the adjustable red light 118. The RGB light module 410 further includes the LEDs 132 and the LEDs 134 that together with LEDs 130 correspond to the second LED light source 114 of FIG. 1 that provides the adjustable green light 120. The RGB light module 410 further includes the LEDs 138 and the LEDs 140 that together with LEDs 136 correspond to the third LED light source 116 of FIG. 1 that provides the adjustable blue light 122. As described above with respect to FIG. 1, the adjustable red light 118 may be strictly the main red light 142 provided by the LEDs 124, a combination of the main red light 142 and the deep red light 144 provided by the LEDs 126, or a combination of the main red light 142 and the amber light 146 provided by the LEDs 128. The adjustable green light 120 may be strictly the main green light 148 provided by the LEDs 130, a combination of the main green light 148 and the amber light 150 provided by the LEDs 132, or a combination of the main green light 148 and the cyan light 152 provided by the LEDs 134. The adjustable blue light 122 may be strictly the main blue light 154 provided by the LEDs 136, a combination of the main blue light 154 and the cyan light 156 provided by the LEDs 138, or acombination of the main blue light 154 and the blue adjustment light 158 provided by the LEDs 140. As described above, the blue adjustment light 158 may be a royal blue light, a violet light, or a preset mix of royal blue and violet lights.

In some example embodiments, the tuning driver 106 of the RGB lighting device 400 may provide power to the LEDs 126, the LEDs 128, the LEDs 132, the LEDs 134, the LEDs 138, and the LEDs 140 in the same manner as described with respect to the RGB lighting device 100 of FIG. 1. In contrast to the RGB lighting device 100, the auxiliary power that is provided to the tuning driver 106 of the RGB lighting device 400 is based on the power provided to the LEDs 124, the LEDs 130, and the LEDs 136. To illustrate, an electrical node 412 between serially adjacent LEDs of the LEDs 124, an electrical node 414 between serially adjacent LEDs of the LEDs 130, and an electrical node 416 between serially adjacent LEDs of the LEDs 136 may be tapped, and the voltages at the electrical nodes 412, 414, 416 may be used to provide the auxiliary power to the tuning driver 106 through rectifier diodes 402, 404, 406 that have cathode terminals connected to the tuning driver 106 by an electrical connection 408.

In some example embodiments, the adjustable red light 118, the adjustable green light 120, and the adjustable blue light 122 may each be tuned based on control inputs received via the user control interface 110 in the manner described with respect to the RGB lighting device 100 of FIG. 1.

In some example embodiments, the LEDs 124, the LEDs 130, and the LEDs 136 may be on a separate circuit board from a circuit board that has the LEDs 126, the LEDs 128, the LEDs 132, the LEDs 134, the LEDs 138, and the LEDs 140. In some alternative embodiments, the RGB lighting device 400 may include other components than shown without departing from the scope of this disclosure. In some alternative embodiments, the LEDs 126, the LEDs 128, the LEDs 132, the LEDs 134, the LEDs 138, and the LEDs 140 may include more or fewer LEDs than shown without departing from the scope of this disclosure. In some alternative embodiments, the LEDs 126, the LEDs 128, the LEDs 132, the LEDs 134, the LEDs 138, and the LEDs 140 may be connected in different configurations than shown without departing from the scope of this disclosure.

FIG. 5 illustrates a chromaticity chart 500 of the RGB lights provided by the RGB light module 102 of FIG. 1 according to an example embodiment. The locations of the deep red light 144, the main red light 142, the amber lights 146, 150, the main green light 148, the cyan lights 152, 156, and the main blue light 154 are shown on the chromaticity chart 500. The royal blue light and the violet light that may correspond to the blue adjustment light 158 as described with respect to FIG. 1 are also shown on the chromaticity chart 500.

In some example embodiments, combining the deep red light 144 with the main red light 142 and alternatively combining the amber light 146 with the main red light 142 may result in the adjustable red light 118 having a purity that does not deviate much, if any, from the purity of the main red light 142. For example, the purity of the main red light 142 and the purity of the adjustable red light 118 approximately 99%. The relatively thicker solid and dotted lines on two sides of the main red light 142 illustrate the range of the adjustable red light 118 on the chromaticity chart 500. In general, the purity of a light is related to the deviation of the light from the monochromatic curve 502.

To illustrate with respect to the main green light 148, the purity of the main green light 148 is the ratio of parameters ‘d’ over ‘D’, where d is the distance between the equal energy point E and the actual location of the main green light 148 on the chromaticity chart 500, and ‘D’ is the distance between the equal energy point E and the location of the dominant wavelength of the main green light 148 on the monochromatic curve 502.

In some example embodiments, combining the amber light 146 with the main green light 148 and alternatively combining the cyan light 150 with the main green light 148 may result in the adjustable green light 120 having a purity that does not excessively deviate from the purity of the main green light 148. For example, the purity of the main green light 148 may be approximately 78% and the purity of the adjustable green light 120 may be approximately 68%. The relatively thicker solid and dotted lines on two sides of the main green light 148 illustrate the range of the adjustable green light 120 on the chromaticity chart 500. Combining the cyan light 156 with the main blue light 154 and alternatively combining the royal blue light, the violet light, or a mix of royal blue and violet lights with the main blue light 154 may result in the adjustable blue light 122 having a purity that does not deviate much from the purity of the main blue light 154. The relatively thicker solid and dotted lines on two sides of the main blue light 154 illustrate the range of the adjustable blue light 122 on the chromaticity chart 500.

Although the chromaticity chart 500 is described with respect to the RGB lighting device 100 FIG. 1, the description is applicable to the RGB lighting device 200 FIG. 2 and the RGB lighting device 400 FIG. 4 without departing from the scope of this disclosure.

FIG. 6 illustrates a chromaticity chart 600 of the RGB lights provided by the RGB light module 320 of FIG. 3 according to another example embodiment. In contrast to the chromaticity chart 500 of FIG. 5, the chromaticity chart 600 shows relatively thicker solid and dotted lines on two sides of the main royal blue light 312 illustrating the wavelength range of the second adjustable blue light 310 of FIG. 3 that may be a combination of the main royal blue light 312 and the blue light 314 and alternatively a combination of the main royal blue light 312 and the violet light 316. The second adjustable blue light 310 may have a purity that does not deviate much from the purity of the main royal blue light 312.

Although particular embodiments have been described herein in detail, the descriptions are by way of example. The features of the example embodiments described herein are representative and, in alternative embodiments, certain features, elements, and/or steps may be added or omitted. Additionally, modifications to aspects of the example embodiments described herein may be made by those skilled in the art without departing from the scope of the following claims, the scope of which are to be accorded the broadest interpretation so as to encompass modifications and equivalent structures.

Claims

1 . A red, green, and blue (RGB) light module (102, 202, 320, 410), comprising: a first light emitting diode (LED) light source (112, 204) configured to provide an adjustable red light (118, 210) including a main red light (142), wherein the adjustable red light is adjustable to further include a first amber light (146, 216) or a deep red light (144); a second LED light source (114, 206) configured to provide an adjustable green light (120, 212) including a main green light (148), wherein the adjustable green light is adjustable to further include a second amber light (150, 216) or a first cyan light (152, 218); and a third LED light source (116, 208) configured to provide an adjustable blue light (122, 214) including a main blue light(l 54), wherein the adjustable blue light is adjustable to further include a second cyan light (156, 218) or a blue adjustment light (158), a controller (108), wherein the adjustable red light (118, 210) is adjustable based on a first control input received by the controller from a user control interface (110), wherein the adjustable red light is adjusted by providing current to the first amber light (146) or the deep red light (144) but not to both at the same time, wherein the adjustable green light (120) is adjustable based on a second control input received by the controller from the user control interface (110), wherein the adjustable green light (120) is adjusted by providing current to the second amber light (150) or the first cyan light (152) but not to both at the same time, wherein the adjustable blue light (122) is adjustable based on a third control input received by the controller from the user control interface (110), and wherein the adjustable blue light is adjusted by providing current to the second cyan light (156) or the blue adjustment light (156) but not to both at the same time.

2. The RGB light module (102, 202, 320, 410) of Claim 1, wherein the first amber light (146, 216) is off when the deep red light (144) is on, wherein the deep red light (144) is off when the first amber light (146, 216) is on, wherein the second amber light (150, 216) is off when the first cyan light (152, 218) is on, wherein the first cyan light (152, 218) is off when the second amber light (150, 216) is on, wherein the second cyan light (156, 218) is off when the blue adjustment light (158) is on, and wherein the blue adjustment light (158) is off when the second cyan light (156, 218) is on.

3. The RGB light module (102, 202, 320, 410) of Claim 1, wherein the adjustable red light (118, 210) has a dominant wavelength in a range of 600 nm to 650 nm, wherein the adjustable green light (120, 212) has a dominant wavelength in a range of 510 nm to 550 nm, and wherein the adjustable blue light (122, 214) has a dominant wavelength in a range of 460 nm to 485 nm.

4. The RGB light module (102, 202, 320, 410) of Claim 3, wherein the blue adjustment light (158) is royal blue light having a peak wavelength in a range of 445 nm to 455 nm.

5. The RGB light module (102, 202, 320, 410) of Claim 3, wherein the blue adjustment light (158) is violet light having a peak wavelength in a range of 400 nm to 410 nm.

6. The RGB light module (102, 202, 320, 410) of Claim 3, wherein the blue adjustment light (158) is a combination of royal blue light and violet light and wherein the blue adjustment light has a peak wavelength in a range of 435 nm to 450 nm.

7. The RGB light module (102, 202, 320, 410) of Claim 3, wherein the main red light (142) has a peak wavelength in a range of 615 nm to 650 nm, wherein the main green light (148) has a peak wavelength in a range of 520 nm to 530 nm, and wherein the main blue light (154) has a peak wavelength in a range of 465 nm to 480 nm.

8. The RGB light module (102, 202, 320, 410) of Claim 1, further comprising a fourth LED light source (302) configured to provide a second adjustable blue light (310) including main royal blue light (312), wherein the second adjustable blue light is adjustable such that the second adjustable blue light further includes an adjustment blue light (314) or a violet light (316).

9. A red, green, and blue (RGB) light fixture (100, 200, 300, 400), comprising: a main driver (104); and an RGB light module (102, 202, 320, 410) comprising: a first light emitting diode (LED) light source (112, 204) configured to provide an adjustable red light (118, 210) including a main red light (142), wherein the adjustable red light is adjustable to further include a first amber light (146, 220) or a deep red light (144); a second LED light source (114, 206) configured to provide an adjustable green light (120, 212) including a main green light (148), wherein the adjustable green light is adjustable to further include a second amber light (150, 220) or a first cyan light (152, 222); and a third LED light source (116, 208) configured to provide an adjustable blue light (122, 214) including a main blue light(l 54), wherein the adjustable blue light is adjustable to further include a second cyan light (156, 222) or a blue adjustment light (158), wherein the main driver is configured to provide power to the first LED light source, the second LED light source, and the third LED light source; and a controller (108), wherein the adjustable red light (118, 210) is adjustable based on a first control input received by the controller from a user control interface (110), wherein the adjustable red light is adjusted by providing current to the first amber light (146) or the deep red light (144) but not to both at the same time, wherein the adjustable green light (120) is adjustable based on a second control input received by the controller from the user control interface (110), wherein the adjustable green light (120) is adjusted by providing current to the second amber light (150) or the first cyan light (152) but not to both at the same time, wherein the adjustable blue light (122) is adjustable based on a third control input received by the controller from the user control interface (110), and wherein the adjustable blue light is adjusted by providing current to the second cyan light (156) or the blue adjustment light (156) but not to both at the same time.

10. The RGB light fixture (100, 200, 300, 400) of Claim 9, wherein the first amber light (146, 220) is off when the deep red light (144) is on, wherein the deep red light (144) is off when the first amber light (146, 220) is on, wherein the second amber light (150, 220) is off when the first cyan light (152, 222) is on, wherein the first cyan light (152, 222) is off when the second amber light (150, 220) is on, wherein the second cyan light (156, 222) is off when the blue adjustment light (158) is on, and wherein the blue adjustment light (158) is off when the second cyan light (156, 222) is on.

11. The RGB light fixture (100, 200, 300, 400) of Claim 9, wherein the intensity of the first amber light (146) is adjusted by adjusting a first current provided to first one or more amber LEDs (128) and wherein the intensity of the deep red light (144) is adjusted by adjusting a second current provided to one or more deep red LEDs (126).

12. The RGB light fixture (100, 200, 300, 400) of Claim 9, wherein the adjustable red light (118) has a dominant wavelength in a range of 600 nm to 650 nm, wherein the adjustable green light (120) has a dominant wavelength in a range of 510 nm to 550 nm, and wherein the adjustable blue light (122) has a dominant wavelength in a range of 460 nm to 485 nm.

13. The RGB light fixture (100, 200, 300, 400) of Claim 12, wherein the blue adjustment light (158) is royal blue light having a peak wavelength in a range of 445 nm to 455 nm.

14. The RGB light fixture (100, 200, 300, 400) of Claim 12, wherein the blue adjustment light (158) is a combination of royal blue light and violet light and wherein the blue adjustment light has a peak wavelength in a range of 435 nm to 450 nm.

15. The RGB light fixture (100, 200, 300, 400) of Claim 12, wherein the main red light (142) has a peak wavelength in a range of 615 nm to 650 nm, wherein the main green light (148) has a peak wavelength in a range of 520 nm to 530 nm, and wherein the main blue light (154) has a peak wavelength in a range of 465 nm to 480 nm.