WO2022161884A1

WO2022161884A1 - A system for uv-treatment in a containment

Info

Publication number: WO2022161884A1
Application number: PCT/EP2022/051419
Authority: WO
Inventors: Jacqueline Ronghong QIU; Ties Van Bommel
Original assignee: Signify Holding B.V.
Priority date: 2021-01-28
Filing date: 2022-01-24
Publication date: 2022-08-04

Abstract

A system (100) for UV-treatment in a containment (110), the system comprising a first light source (130) for emitting into said containment UV light (138) having a first spectral distribution (135), said first spectral distribution including UV light with a germicidal effect within a specific wavelength range (139) and a second light source (140) for emitting into said containment UV or Violet light having a second spectral distribution 5(145) excluding said specific wavelength range. A controller (170) is configured to activate the first light source (130) when the door is closed and deactivate the first light source (130) when a door is opened, and activate the second light source (140) when the door is closed and deactivate the second light source (140) a first predetermined time after the door is opened.

Description

A system for uv-treatment in a containment

FIELD OF THE INVENTION

The present inventive concept is related to UV treatment and more specifically a system for UV treatment in a containment.

BACKGROUND OF THE INVENTION

In medical facilities, disinfection of equipment, instruments, and other objects is important to reduce the transmission of pathogens and prevent the spread of illnesses between individuals. Given the recent developments, disinfection has become an increasingly important topic. Disinfection can be accomplished in a variety of ways, for example by using UV light and/or disinfecting agents. The effectiveness of a disinfection system can depend on the physical setting and/or method of disinfection. For example, intensity, proximity, line of sight and time of exposure may affect the ability of UV light emitted from a disinfection system to effectively eliminate pathogens on equipment and/or within spaces.

However, the UV light sources, being important candidates for disinfection and germicidal applications, may be harmful and may provide damage to the eyes and skin of humans. The degree of damage from UV -light, and thus to what extent the UV -light is considered harmful may be dependent on its wavelength and some wavelength ranges may be considered more harmful than others. Accordingly, having UV light sources as active disinfecting system in containments where humans risk exposure is associated with danger and there may be a risk of damages to for example the eyes and/or skin of the people working within said containment caused by the UV radiation. This may be solved by providing the proper safety equipment to the people working within said containment. Another approach is presented in WO2019246394A1 where a chamber for disinfecting object is disclosed. The disinfection system includes one or more sensor(s) for collecting information regarding components of disinfection system, objects within and/or near disinfection system, and/or other information that may affect the operation of disinfection system. The system therein may further have a processor that can be configured to deactivate the disinfection system in cases where a user may be harmed by disinfection procedures. WO 2019/008227 discloses a system for controlling growth of microorganisms, comprising a first light source for radiating a blue light at a first wavelength that ranges between 400 to 480 nm to control growth of microorganisms; a second light source for radiating an ultra-violet light at a second wavelength that ranges between 250 to 300 nm to kill microorganisms; a light sensor for detecting an intensity of a light; a motion sensor for detecting a moving object; and a microcontroller, communicatively connected to the first light source, the second light source, the light sensor and the motion sensor, configured to modify an intensity of the blue light based on the light sensor data; and control an intensity of the ultra-violet light based on detection of a moving object by the motion sensor.

It is desired to improve the safety, efficiency and/or performance of disinfection light sources.

SUMMARY OF THE INVENTION

It is an object of the present invention to overcome this problem, and to provide a system for UV treatment in a containment capable of continue safe disinfection treatment from electromagnetic radiation while humans risk exposure to said electromagnetic radiation.

According to a first aspect of the invention, this and other objects are achieved by a system for UV -treatment in a containment, which containment is accessible through an opening, the system comprising a first light source for emitting into said containment UV light having a first spectral distribution, said first spectral distribution including UV light within a specific wavelength range, wherein the UV light in the specific wavelength range has a germicidal effect. The system also comprises a second light source for emitting into said containment UV or Violet light having a second spectral distribution, said second spectral distribution excluding said specific wavelength range. The system further comprises a door arranged in said opening. The system also comprises a door sensor providing a sensor signal indicative of when the door is closed and when the door is opened. A controller connected to said door sensor and configured to individually control the first light source and the second light source based on said sensor signal. The controller is further configured to activate the first light source when the door is closed and deactivate the first light source when the door is opened, and activate the second light source when the door is closed and deactivate the second light source a first predetermined time after the door is opened. By the door being opened it should be understood that the door is in any position where it is not fully closed, i.e. the door may be opened slightly or fully.

After a given time has lapsed, and the door is still open, it may be determined that the containment is not in use and/or that it may be undesirable to continue illumination by the second light source. At this point, the second light source can therefore also be switched off reducing energy consumption and unnecessary illumination within the containment. The second light source may also be arranged such that it emits light outside said containment.

The first predetermined time (D) may be greater than 5 seconds, which typically is sufficient to e.g. allow a user to take a product out of the containment. Further, the first predetermined time (D) may be less than 60 seconds. By this time, it is typically safe to assume that operation has been interrupted and the light source can be deactivated to save energy.

The first light source and/or the second light source may be solid state light sources, such as LEDs, which are energy effective.

According to an embodiment the controller is further configured to activate the first light source a second predetermined time after the door is closed.

This embodiment is advantageous in that it may further decrease wear on the first light source and/or energy consumption when the door is closed and opened with a short time interval e.g. when the door is closed my mistake or when the user needs to re-enter the containment for other reasons within a short time after the door has recently been closed, thus the first light source may not be activated to be deactivated just moments later.

In certain applications it may be desired to have the UV light in the specific wavelength range to be within wavelengths considered harmful to humans. In such applications the invention is especially advantageous since the UV light in the specific wavelength range will be deactivated when opening the door, thereby providing an increased safety for the user of the system, by effectively protecting the user from exposure to such harmful light.

For example, the specific wavelength range may be 100-200nm and/or 230- 280nm, i.e. the first light source may be configured to emit UV light within 100-200nm and/or 230-280nm which wavelength ranges have shown to be particularly effective for killing bacteria and viruses. Further, these wavelength ranges are also considered harmful to humans. The second spectral distribution does not include the specific wavelength range and may thus comprise wavelength ranges considered less harmful to humans compared to the specific wavelength range. On the other hand, light from the second light source may also still have some germicidal effect, but possibly less effective than the germicidal effect of light from the first light source. This ensures a continuous disinfection inside the containment since the second light source is not immediately deactivated when opening the door.

For example, the second spectral distribution may comprises light within 200- 230nm, 280-315nm, 315-380nm and/or 380-420nm, i.e. the second light source may be configured to emit light within Far-UV (200-230nm), UV-B light (280-315nm), UV-A light (315-380nm) and/or Violet light (380-420nm), which have shown to be less harmful to humans. An advantage of using Far-UV and/or UV-B light is that these wavelengths may provide a continuous disinfection of the containment since these wavelength ranges have shown to also have some germicidal effect, killing both bacteria and viruses. Further, UV-A light and/or Violet light have also shown some germicidal effect, with the ability to kill at least bacteria but may be less effective in killing viruses. Another advantage with Far-UV light and/or UV-B light is that these wavelength ranges are invisible to the eye, in contrast to for example Violet light (380-420nm) that could intimidate the user and make the user believe that light within the containment is dangerous.

According to an embodiment the controller is configured to control the second light source to emit light with a first intensity (II) when the door is closed and a second intensity (12) when the door is opened and wherein the second intensity (12) is less than the first intensity (II). For example, if the second light source is used to provide working light while the door is open, a reduced intensity may be sufficient, thereby saving energy.

In some cases the ratio of the first intensity (II) to the second intensity (12) is larger than or equal to 2. Reducing the intensity of the second light source when opening the door may especially be advantageous in cases where the second spectral distribution is also somewhat harmful and thus this may decrease the risk of damages to the user while operating within the containment when the door is opened.

According to a second aspect of the invention a user interface is provided to control the system according to the first aspect, wherein the user interface requests one or more of the following a time input for a time for deactivating the second light source after the door is determined to be opened and an intensity input for an intensity of at least one of said first light source and said second light source This second aspect is advantageous in that the user may be able to set parameters, such as time for deactivating the second light source and the intensity of the first and/or second light sources and adapt these parameters after the predetermined application.

According to a third aspect of the invention a method is provided for UV- treatment in a containment, the containment is accessible through an opening, wherein a door is arranged in said opening, method comprises:

- activating a first light source when the door is closed, wherein the first light source emits UV light having a first spectral distribution into said containment, said first spectral distribution including a specific wavelength range;

- activating a second light source when the door is closed, wherein the second light source emits UV or Violet light having a second spectral distribution into said containment, said second spectral distribution excluding said specific wavelength range;

- deactivating first light source when the door is opened, and

- deactivating the second light source a first predetermined time after the door is opened.

This third aspect provides the same advantages as were discussed in relation to the first aspect above. Accordingly, the UV light from the first light source will be interrupted as soon as the door is opened, while the illumination from the second light source is maintained. This allows for a continuous illumination from the second light source within the containment even after opening the door while reducing the risk of damages to the person operating the system.

It is noted that the invention relates to all possible combinations of features recited in the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

This and other aspects of the present invention will now be described in more detail, with reference to the appended drawings showing embodiment(s) of the invention.

Fig. 1 illustrates a system for UV -treatment in a containment according to at least one embodiment of the invention.

Fig. 2 illustrates a first spectral distribution and a second spectral distribution according to at least one embodiment of the invention.

Fig. 3 illustrates a system for UV -treatment in a containment according to at least one embodiment of the invention. Fig. 4 illustrates a time sequence when operating a system for UV -treatment in a containment according to at least one embodiment of the invention.

Fig. 5 illustrates a method for controlling a system for UV -treatment in a containment.

As illustrated in the figures, the sizes of layers and regions are exaggerated for illustrative purposes and, thus, are provided to illustrate the general structures of embodiments of the present invention. Like reference numerals refer to like elements throughout.

DETAILED DESCRIPTION

The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which currently preferred embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness, and fully convey the scope of the invention to the skilled person.

With reference to Fig. 1 a system 100 for UV -treatment in a containment 110 according to at least one embodiment of the invention is illustrated. The containment 110 is accessible through an opening 120. The system 100 comprises a first light source 130 for emitting into said containment 110 UV light 138 having a first spectral distribution 135, said first spectral distribution 135 (exemplified in Fig. 2) including a specific wavelength range, wherein the UV light 138 in the specific wavelength range has a germicidal effect. The specific wavelength range may comprise UV light within 100-200nm and/or 230-280nm. Also, the UV light in the specific wavelength range may be considered harmful to humans. UV light within 100-200nm may be referred to as extreme UV-C light and the UV light within 230-280nm may be referred to as near UV-C light.

The system 100 further comprises a second light source 140 for emitting into said containment 110 UV or Violet light 148 having a second spectral distribution 145 (exemplified in Fig. 2), said second spectral distribution 145 excluding said specific wavelength range 139 (exemplified in Fig.2). In other words, said second spectral distribution 145 may exclude light within said specific wavelength range 139. The light of wavelengths in the second spectral distribution 145, e.g. the UV or Violet light 148, may also have a germicidal effect being less effective than a germicidal effect of the UV light in the specific wavelength range. Table 1 discussed to Fig. 2 clearly shows that UV-C has a higher sterilization effectiveness regarding viruses compared to Violet, UV-A and UV-B.

Further, Table 1 clearly shows UV-C has a higher sterilization effectiveness regarding viruses compared to Violet, UV-A and UV-B. Also, 100-200nm and 230-280 are (relatively) not safe with respect to other wavelength ranges in the UV.

Table 1 also clearly shows the wavelength ranges for the second spectral distribution which are (relatively) more safe. 200-230 nm would be selected to provide highest sterilization effectiveness. This range is also relatively safe. 280-315 nm can also kill viruses, but its effectiveness is somewhat lower. It is also a bit less safe. But it has the benefit that vitamin can be generated in the skin. 315 — 380nm has the advantage of being relatively safe. It cannot kill (most ol) the viruses. But it is effective against bacteria. 380-420 is very safe to use. It can also be easy implemented in lighting devices as these LEDs are not that much different from blue LEDs. It cannot kill viruses but it can be used for reducing bacteria. Further, the wavelength ranges 200-230 nm and 280-315nm kill, next to bacteria, also viruses. Compared to near UV-C, these two wavelength ranges are safer to use.

The second spectral distribution 145 may comprise light within 200-230nm which may also be referred to as Far-UV, 280-315nm which may also be referred to as UV-B light, 315-380nm which may also be referred to as UV-A light and/or 380-420nm which may also be referred to as Violet light. The second light source 140 may be arranged such that it emits light outside said containment 110. For example, the second light source 140 may be arranged at least partially outside, partially emitting light to the outside of the containment 110. Further, the second light source 140 may be arranged such that it emits light though said opening 120 such that when opening the containment 110, the light from the second light source 140 is emitted though the opening 120 to the outside of the containment 110.

At least one of the first light source 130 and the second light source 140 may be a Solid State Lighting light source (SSL), such as LEDs. Preferably, the system 100 is fully based on SSL light sources, i.e. the first and second light sources 130,140 are both SSL light sources which may provide simpler electronics compared to a situation of using two different light source technologies.

The first light source 130 and/or the second light source 140 may each comprise several light sources. In such case, when the second light source 140 comprises several light sources, at least one of these may be arranged to provide light outside the containment 110. See Fig. 2 for further discussion on the lights sources 130,140 and the first and second spectral distributions 135,145. The system also comprises a door 150 arranged in said opening 120 and a door sensor 160 providing a sensor signal 165 indicative of when the door 150 is closed and when the door 150 is opened. Further, the system comprises a controller 170 connected to said door sensor 160 and configured to individually control the first light source 130 and the second light source 140 based on said sensor signal 165. The controller 170 may be arranged separate to the containment 110 as illustrated in the figure or arranged within the containment 110. For example, the controller 170 may be arranged as an integrated component to the walls defining the containment 110.

The controller 170 is configured to activate the first light source 130 when the door 150 is closed and deactivate the first light source 130 when the door 150 is opened. The controller 170 is further configured to activate the second light source 140 when the door 150 is closed and deactivate the second light source 140 a first predetermined time after the door 150 is opened. The controller 170 may be further configured to activate the first light source 130 a second predetermined time after the door 150 is closed. The first predetermined time (D) may be greater than 5 seconds. In some cases shorter time may be sufficient, such that the first predetermined time may be at least 1 second. In other cases, more time may be needed such as the first predetermined time being greater than 8 seconds and/or 10 seconds. In other words, the first predetermined time (D) may be at least 1 second, preferably at least 5 seconds, more preferable at least 8 seconds and most preferably at least 10 seconds. Further, the first predetermined time (D) may be less than 60 seconds. In some cases the first predetermined time (D) may be less than 5 minutes, or less than 2 minutes or even less than 30seconds. In other words, the first predetermined time (D) may be less than 5 minutes, preferably less than 2 minutes, more preferably less than 60 seconds, most preferably less than 30 seconds.

The controller 170 may be configured to control the second light source 140 to emit light with a first intensity (II) when the door 150 is closed. The controller 170 may further be configured to control the second light source 140 to emit light with a second intensity (12) when the door 150 is opened. The second intensity (12) may be less than the first intensity (II). The controller 170 may be configured to control the second light source 140 to emit light with a second intensity (12) immediately after the door 150 has been opened or, alternatively, after a predetermined time after the door 150 has been opened such that the intensity gradually decreases from the first intensity (II) to the second intensity (12). The second intensity (12) of the light from the second light source 140 may thus be reached after a predetermined time after opening the door 150. The ratio of the first intensity (II) to the second intensity (12) may be larger than or equal to 2, i.e. the first intensity (12) may be at least twice that of the second intensity (12). Preferably the ratio is greater than 3, more preferably greater than 4. Further, there may be an upper limit of the ratio such that it is less than 10. The containment 110 may be a cabinet as illustrated in Fig. 1.

In Fig. 2 the first spectral distribution 135 and the second spectral distribution 145 are illustrated according to at least one embodiment. The first spectral distribution 135 illustrated in Fig. 2 has a peak around 254nm, which falls within the wavelength range of 230 - 280nm which is considered harmful to humans. Further, the second spectral distribution 145 in Fig. 2 has a peak around 207nm with a spectral distribution well within the wavelength range of 200-230nm, which is considered less harmful to humans than light within wavelengths of for example 100 - 200nm and 230 - 280 nm. The second spectral distribution 145 may comprise light within a second wavelength range 149 excluding said specific wavelength range 139. The second wavelength range 149 may be at least one of the following wavelength ranges, 200-230nm, 280-315nm, 315-380nm and/or 380-420nm. Accordingly, wavelength ranges of for example 230 - 280nm and 100 - 200nm are excluded in the second wavelength range 149. The second spectral distribution 145 may be provided by a LED light source or an excimer lamp, e.g. an KrBr excimer lamp. The first spectral distribution 135 may be provided by a LED light source or a conventional lamp, comprising for example mercury. The above is non-limiting examples of providing light within the desired wavelength ranges, i.e. light having the first spectral distribution 135 and the second spectral distribution 145, respectively. Accordingly, the first light source 130 may be any light source(s) able to provide UV light within 100 - 200nm and/or 230 - 280nm. The first light source 130 may also provide light outside said wavelength ranges, i.e. 100 - 200nm and/or 230 - 280nm.

The second light source 140 may be any light source(s) able to provide light that excludes wavelengths within 100 - 200nm and/or 230 - 280nm, which may be light sources providing light within for example 200-230nm, 280-315nm, 315-380nm and/or 380- 420nm. Other, non-limiting alternatives for the second spectral distribution 145 may be peaks around 222nm, e.g. when using an KrCl excimer lamp and/or 230nm when using a LED light source.

When a light source is a LED light source its spectral distribution is a relatively narrow peak, having a FWHM (Full-Width Half-Maximum) of about 20nm. When the light source is an excimer lamp the spectral distribution is typically somewhat broader compared to the spectral distribution from for example LED sources.

The ultraviolet wavelength range is defined as light in a wavelength range from 100 to 380 nm and can be divided into different types of UV light / UV wavelength ranges. With reference to Table 1, different UV wavelengths of radiation may have different properties and thus may have different compatibility with human presence and may have different effects when used for disinfection. In the table, a + sign indicates that light in the specific range has the indicated effect, while a - sign indicates that the light in the specific range does not have the indicated effect. A +/- sign indicates a moderate effect. As mentioned below, the effect may in itself be desired or undesired (e.g. ozone generation).

Table 1: Properties of different types of UV wavelength light

Each UV type / wavelength range may have different benefits and/or drawbacks. Relevant aspects may be (relative) sterilization effectiveness, safety (regarding radiation), and ozone production (as result of its radiation). Depending on an application a specific type of UV light or a specific combination of UV light types may be selected and provides superior performance over other types of UV light. UV-A may be (relatively) safe and may kill bacteria, but may be less effective in killing viruses. UV-B may be (relatively) safe when a low dose (i.e. low exposure time and/or low intensity) is used, may kill bacteria, and may be moderately effective in killing viruses. UV-B may also have the additional benefit that it can be used effectively in the production of vitamin D in a skin of a person or animal. Near UV-C may be relatively unsafe, but may effectively kill bacteria and viruses. Far UV may also be effective in killing bacteria and viruses, but may be (relatively to other UV-C wavelength ranges) (rather) safe. Far-UV light may generate some ozone which may be harmful for human beings and animals. Extreme UV-C may also be effective in killing bacteria and viruses, but may be relatively unsafe. Extreme UV-C may generate ozone which may be undesired when exposed to human beings or animals. In some application ozone may be desired and may contribute to disinfection, but then its shielding from humans and animals may be desired. Hence, in the table “+” for ozone production especially implies that ozone is produced which may be useful for disinfection applications, but may be harmful for humans / animals when they are exposed to it. Hence, in many applications this “+” may actually be undesired while in others, it may be desired.

In Fig. 3 a system 100 for UV-treatment in a containment 110 is illustrated. The system 100 in Fig. 3 is similar to the system in Fig. 1, except that the system in Fig. 3 illustrates a containment 110 being a room. Accordingly, the principle is the same, wherein the first and second light sources are switched on and off under the circumstances, i.e. criteria, previously discussed. Further, the first spectral distribution 135 and the second spectral distribution 145 as discussed to Fig. 2 applies to the system in Fig.3 as well. However, since the system in Fig.2 may be large enough to fit a person inside, it may be advantageous to implement a detector to the system 100 for detecting the motion or presence of people within. In such case, the detector may function as an extra safety function wherein the system may not activate the first light source 130 when the door 150 is closed whenever a person is detected within. Alternatively, the containment 110 may be any containment suitable to use UV -light for disinfection purposes.

In Fig. 4 a time sequence when operating a system for UV-treatment in a containment is exemplified. In an initial state the containment 110 may be closed. As first step the door 150 to the containment 110 may be opened and the second light source 140 may then be activated. Subsequently, when closing the door 150 the first light source 130 may be activated immediately, or after a predetermined time from when the door 150 is closed, as illustrated in the Fig. 4. After the first light source 130 is activated, both the first and second light sources 130,140 may be active until the door 150 is opened. When the door 150 is opened the first light source 130 is deactivated. The second light source 140 is continuously active for a predetermined time (D). When the door 150 is closed again, the second time in the figure, for example after a time less than the predetermined time (D) as illustrated in Fig. 4, the second light source 140 may not be deactivated before the first light source 130 is reactivated with the door 150 being closed. In other words, when opening the door 150 and closing it again within a predetermined time, the second light source 140 may emit light continuously without abruption. When the containment 110 is opened again, for the third time in the figure, the first light source 130 is deactivated. After a predetermined time (D) the second light source 140 is also deactivated. At a later point in time the system may again activate the second light source 140 when the door 150 is closed. Further, the first light source 130 may also be activated immediately or with a delay, i.e. after a predetermined time from when the door 150 is closed. Alternatively, the door 150 may be closed without triggering the light sources to activate. This may be done by actively controlling a user interface for deactivating the system and/or may be due to a system timeout, i.e. when a predetermined time has passed without the system being used, the system may automatically switch off. In other words, the system 100 may be controlled to automatically activate the first and second light sources based on the opening of and/or the closing of the door 150 or, alternatively be switched off and thus not respond to the operation of the door. When being switched off, the system may automatically turn on when opening the door, which may again activate the second light source 140.

The user interface may request a time input for defining a time for deactivating the second light source 140 after the door 150 is determined to be opened. In other words, the user interface may request values to define the predetermined time (D). The user interface may also request an intensity input for an intensity of at least one of said first light source 130 and said second light source. The user interface may be connected to the controller 170, thus providing a facilitated control of the system 100.

With reference to Fig. 5 a method 200 for UV -treatment in a containment is illustrated, the containment is accessible through an opening, wherein a door is arranged in said opening and a door sensor is arranged to determine when the door is closed or opened. The method 200 may be applied to the system 100 according to any of the previous embodiments.

The method 200 comprises activating 210 a first light source when the door is closed, wherein the first light source emits UV light having a first spectral distribution into said containment, said first spectral distribution including a specific wavelength range.

The method 200 further comprises activating 220 a second light source when the door is closed, wherein the second light source emits UV or Violet light having a second spectral distribution into said containment, said second spectral distribution excluding said specific wavelength range.

The method also comprises deactivating 230 the first light source when the door is opened, and deactivating 240 the second light source a first predetermined time after the door is opened.

The person skilled in the art realizes that the present invention by no means is limited to the preferred embodiments described above. On the contrary, many modifications and variations are possible within the scope of the appended claims. For example, any light sources may be used as the first and second light source that are able to provide light within the first and second spectral distribution, respectively.

Additionally, variations to the disclosed embodiments can be understood and effected by the skilled person in practicing the claimed invention, from a study of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measured cannot be used to advantage.

Claims

CLAIMS:

1. A system (100) for UV -treatment in a containment (110), the containment is accessible through an opening (120), the system comprising; a first light source (130) for emitting into said containment UV light (138) having a first spectral distribution (135), said first spectral distribution including UV light within a specific wavelength range (139), wherein the UV light within the specific wavelength range has a germicidal effect; a second light source (140) for emitting into said containment UV or Violet light having a second spectral distribution (145), said second spectral distribution excluding said specific wavelength range; a door (150) arranged in said opening; a door sensor (160) providing a sensor signal (165) indicative of when the door is closed and when the door is opened; a controller (170) connected to said door sensor (160) and configured to individually control the first light source (130) and the second light source (140) based on said sensor signal (165); wherein the controller (170) is configured to: activate the first light source (130) when the door is closed and deactivate the first light source (130) when the door is opened, and activate the second light source (140) when the door is closed and deactivate the second light source (140) a first predetermined time after the door is opened.

2. The system according to claim 1, wherein the controller is further configured to activate the first light source a second predetermined time after the door is closed.

3. The system according to anyone of claim 1 or 2, wherein UV light in the specific wavelength range is considered harmful to humans.

4. The system according to any of the preceding claims, wherein the light in wavelengths in the second spectral distribution has a germicidal effect being less effective than a germicidal effect of the UV light in the specific wavelength range.

5. The system according to anyone of the preceding claims, wherein the specific wavelength range is 100-200nm and/or 230-280nm.

6. The system according to claim 5, wherein the second spectral distribution comprises light within 200-230nm, 280-315nm, 315-380nm and/or 380-420nm.

7. The system according to anyone of the preceding claims, wherein the second light source emits light within at least one of 200-230nm or 280-315nm.

8. The system according to anyone of the preceding claims, wherein the first light source and/or the second light source is a solid state light source.

9. The system according to anyone of the preceding claims wherein the controller is configured to control the second light source to emit light with a first intensity (II) when the door is closed and a second intensity (12) when the door is opened and wherein the second intensity (12) is less than the first intensity (II).

10. The system according to claim 9, wherein the ratio of the first intensity (II) to the second intensity (12) is larger than or equal to 2.

11. The system according to anyone of the preceding claims, wherein the second light source is arranged such that it emits at least part of its light outside said containment.

12. The system according to anyone of the preceding claims wherein the first predetermined time (D) is greater than 5 seconds.

13. The system according to anyone of the preceding claims wherein the first predetermined time (D) is less than 60 seconds. 17

14. A user interface to control the system according to anyone of the preceding claims wherein the user interface requests one or more of the following

(i) a time input for a time for deactivating the second light source after the door is determined to be opened, and (ii) an intensity input for an intensity of at least one of said first light source and said second light source.

15. A method (200) for UV -treatment in a containment, the containment is accessible through an opening, wherein a door is arranged in said opening and a door sensor is arranged to determine when the door is closed or opened, method comprises; activating (210) a first light source when the door is closed, wherein the first light source emits UV light having a first spectral distribution into said containment, said first spectral distribution including a specific wavelength range; activating (220) a second light source when the door is closed, wherein the second light source emits UV or Violet light having a second spectral distribution into said containment, said second spectral distribution excluding said specific wavelength range; deactivating (230) first light source when the door is opened, and deactivating (240) the second light source a first predetermined time after the door is opened.