AU2016102225A4 - Solar powered outdoor lighting device - Google Patents

Abstract

A solar powered outdoor lighting device including a solar panel located on a mounting plate and a battery electrically connected to the solar panel. The lighting device also includes a lighting element electrically connected to the battery and located on the mounted on the plate. The solar panel, lighting element and the mounting plate are positioned within a housing and the housing is adapted to be mounted to a post. ?O~nl6 POv1 2920681vl

Description

1 2016102225 23 Dec 2016

SOLAR POWERED OUTDOOR LIGHTING DEVICE

FIELD OF THE INVENTION

The present invention relates to an outdoor lighting device, and in particular to a solar powered submersible/waterproof outdoor lighting device. The present invention has particular but not exclusive application as a garden, pathway, deck, jetty, pontoon, drive way, area, marine marker, evacuation point marker or bollard light.

BACKGROUND TO THE INVENTION

Reference to background art herein is not to be construed as an admission that such art constitutes common general knowledge.

Solar powered outdoor lighting devices have been developed in an effort to reduce the need for electrical connections exposed to outdoor conditions, but also to reduce and/or eliminate electricity requirements and the negative effects of greenhouse gas emissions from fossil fuel power generation. However, conventional solar powered outdoor lighting devices have been found to be insufficiently durable in outdoor environments. Conventional solar powered outdoor lighting devices also provide insufficient energy to sustainably power the lighting device at full power consistently without dimming or disconnecting the lighting elements, and/or to have a high enough illumination for the application. 2920689vl 2 2016102225 23 Dec 2016

Outdoor lighting devices are typically employed in locations that are exposed to the elements and act of god-type events. Accordingly, the lighting devices and any electrical connections are typically designed to endure low level weather events. Despite these efforts, due to wear and tear, poor design, and/or sub-par workmanship, conventional and weather proof outdoor lighting devices are prone to failure.

The inability to provide sufficient energy to sustainably power the lighting device at full illumination without dimming/and or disconnect of power to the lighting elements for the geographical location is in part caused by one or more of: the solar panel being shaded by portions of the actual lighting device itself; ingress of water, moisture, condensation, dust, and other containments affecting the solar panel; and more so battery/energy storage device connection terminals, electronic/electrical circuit due to oxidisation and shorting, and other components; inability of natural air convection for cooling in similar lighting devices using microprocessor type componentry inside fully sealed enclosures causing eventual overheating and failure; inability to optimise solar panel power output; inability to control energy usage; failure to account for sunlight availability in various geographical locations, and in various seasons; use of low grade solar cells and solar panel assembly; and failure to match the lighting load to the solar panel rating. 2920689vl 3 2016102225 23 Dec 2016

Accordingly, conventional solar powered outdoor lighting devices have been found to be ill-equipped to consistently, sustainably and reliably run a full night cycle without failing.

Also however, conventional solar powered outdoor lighting devices have been found to be insufficient in providing full distribution of illumination created by the lighting element.

The inability to provide full distribution of illumination created by the lighting element, is in part caused by one or more of: the type of lighting element components are not being used efficiently or the design is inefficient; the placement of the actual lighting element can be partially blocked and or shaded by surfaces in the design of the diffuser/mounting plate of the lighting elements in the direction of external regions of the solar powered outdoor lighting device; the lighting element is positioned in such a way that a percentage of the illumination produced from the lighting element, illuminates directly externally, whilst the balance illuminates internally towards the centre of the solar powered outdoor lighting device; illuminating internally towards the centre of the solar powered outdoor lighting device then requires reflective diffusion to redirect light outwards from the device which highly depreciates the intensity of initial illumination being redirected externally making the device inefficient; and the mounting of the lighting element light source directly downwards on a flat surface, produces more heat back onto the lighting component used and 2920689v1 4 2016102225 23 Dec 2016 quicker degradation of its lumen output and life span, such in the use of Light Emitting Diodes which are effected by heat.

Accordingly, conventional solar powered outdoor lighting devices have been found to be incapable of achieving reasonable lighting level requirements to make them a cost effective alternative to mains powered lighting.

Also however, conventional solar powered outdoor lighting devices have been found to be not ruggedized enough due to the materials used to seal, join or encapsulate some of the components, is in part caused by one or more of: use of epoxy encapsulation as impact protection on exposed solar panels where shattering and/or cracking of the epoxy encapsulation can occur with direct effect to solar cell damage due to hairline fractures making the solar panel defective; yellowing of the epoxy encapsulation exposed to UV diminishing recharge capabilities leading to eventual premature failure; and use of O-ring seals for sealing main external areas susceptible to expansion and contraction due to the elements of enclosures components sealing with a non-flexible and durable elastomeric silicone rubber sealant as hard curing glues become ridged and will shatter/break or become brittle under impact and/or UV effects thus separating the sealed substrates.

Additionally, conventional solar powered outdoor lighting devices are typically assembled using hard forming adhesive or glues and screws. This method of assembly can be slow and prone to error and damage without 2920689vl 5 2016102225 23 Dec 2016 systemised processes and receiving direct impact. Internal components such as batteries also cannot be replaced in some instances.

OBJECT OF THE INVENTION

It is an aim of this invention to provide an outdoor lighting device which overcomes or ameliorates one or more of the disadvantages of problems described above, or which at least provides a useful alternative.

Other preferred objects of the present invention will become apparent from the following description.

SUMMARY OF THE INVENTION

In one form, although it need not be the only or indeed the broadest form, there is provided a solar powered outdoor lighting device compromising: a solar panel; a battery electrically connected to the solar panel; a mounting plate, the solar panel located on the mounting plate; a lighting element electrically connected to the battery and located on the mounting plate; and a housing within which the solar panel, the lighting element, and the mounting plate are positioned and adapted to be mounted to a post.

Preferably, the housing comprises a dome and a body, wherein a lip and a recess cavity provided between the dome and the body form a sealing area preventing ingress of water, moisture and dust into the cavity. 2920689vl 6 2016102225 23 Dec 2016

Preferably, the mounting plate is located within a cavity defined by the dome and the body.

Preferably, the mounting plate is supported on a flange extending around an inner edge of the body. More preferably, the flange extends around an inner edge of the dome.

Preferably, light sources on the lighting element are mounted at angles from 1° to 90° from horizontal to project light down and/or outwards ensuring no diffusion or reflection is required for full light emitting efficiency from the housing.

Preferably, the light sources comprise one or more light emitting diodes (LEDs).

Preferably, the solar powered outdoor lighting device further comprises a control circuit for controlling an operation of the lighting element, the control circuit configured to control an emitted light intensity of the lighting element preset at an intensity in consideration of a geographical location of the solar powered outdoor lighting device.

Preferably, the lighting device further comprises a lip section and recess cavity provided between the dome and the body, forming a sealing area offering slight movement when impacted using a high UV rated flexible and durable silicone rubber elastomeric sealant adhesive with a service temperature of -50°C to +205°C preventing ingress of water, moisture and dust into the cavity especially after being impacted or exposed to the elements. 2920689vl 7 2016102225 23 Dec 2016

Preferably, the solar panel is located on an upper side of the mounting plate to have substantially uninhibited exposure to sunlight. More preferably, the solar panel is located on an upper side of the mounting plate between the mounting plate and the dome of the housing. Preferably, the solar panel is located on a raised annular edge of mounting plate.

Preferably, the lighting element is located on an under side of the mounting plate to project light down and/or outwards from the housing ensuring no diffusion or reflection is required for full light emitting efficiency from the housing. More preferably, the lighting element is located on a side of the mounting plate opposing the solar panel.

Preferably, the control circuit monitors an output voltage of the solar panel to determine when the lighting element is to be operated by reverse voltage and/or PE cell type configuration.

Preferably, the control circuit regulates output voltage and current of the solar panel to achieve optimal power output for regulated recharge control of the internal battery/energy storage device.

Preferably, the lighting element is located near a top of the housing towards the centre of the mounting plate.

Preferably, the lighting element is located near a top of the housing towards the middle of the mounting plate.

Preferably, the lighting element is located near a top of the housing assembly towards the outer edge of the mounting plate. 2920689vl 8 2016102225 23 Dec 2016

Preferably, the lighting elements are supported on an epoxy encapsulated printed circuit board ensuring no water, moisture, condensation, dust, and other containments can penetrate and short or fault the printed circuit board.

Preferably, the lighting device further comprises a base assembly coupled and sealed to the body, and a battery coupled to the base assembly into the interior of the body.

Preferably, the base assembly is supported by the body using stainless steel screws and a high UV rated flexible and durable silicone rubber elastomeric sealant adhesive with a service temperature of -50°C to +205°C.

Preferably, the battery housing and base assembly are coupled together by a bayonet type twist fitting under pressure of a flat compression sealing ring that stops dislodgement of the battery housing from the base assembly.

Preferably, a flat compression sealing ring is provided between the lower base assembly and the battery/energy storage device component compartment to form a water tight seal coupled together by a bayonet type twist fitting under pressure.

Preferably, a flat compression sealing ring is provided between the body and the base assembly to form a water tight seal. Preferably, a bead of a high UV rated flexible and durable silicone rubber elastomeric sealant adhesive with a service temperature of -50°C to +205°C is applied to the sealing ring to form a water tight seal.

Preferably, the battery is a rechargeable battery. Suitably, the battery can be a lithium ion battery. 2920689vl 9 2016102225 23 Dec 2016

Preferably, the battery is housed within a battery housing. Preferably, the battery housing is located in a cavity of the housing.

According to a further embodiment of the present invention, there is provided a solar powered submersible/waterproof outdoor lighting device compromising a solar panel, connected to an internal electronic/electrical circuit board containing an integrated lighting element, connected to the internal battery/energy storage device.

Preferably, the solar panel is mounted to the mounting plate to have substantially uninhibited exposure to sunlight and provide a space between the solar panel and the mounting plate to allow air flow.

Preferably, there is a vent in a floor of the battery housing to prevent the build-up of pressure.

BRIEF DESCRIPTION OF THE DRAWINGS

By way of example only, preferred embodiments of the invention will be described more fully hereinafter with reference to the accompanying figures, wherein: FIG. 1 illustrates a side view of a solar powered outdoor lighting device according to an embodiment of the present invention; FIG. 2 illustrates a cross sectional side view of the solar powered outdoor lighting device illustrated in FIG. 1; FIG. 3 illustrates a side view of the main body of the of the solar powered outdoor lighting device illustrated in FIG. 1; 2920689vl ίο 2016102225 23 Dec 2016 FIG. 3a illustrates a cross sectional side view of the main body of the of the solar powered outdoor lighting device illustrated in FIG. 3; FIG. 3b illustrates an elevated three dimensional side view of the main body of the of the solar powered outdoor lighting device illustrated in FIG. 1; FIG. 3c illustrates an elevated cross sectional side view of the main body of the of the solar powered outdoor lighting device illustrated in FIG. 3b; FIG. 4 illustrates a plan view of the dome of the solar powered outdoor lighting device illustrated in FIG. 1; FIG. 4a illustrates a side view of the dome of the solar powered outdoor lighting device illustrated in FIG. 4; FIG. 4b illustrates a cross sectional side view of the dome of the solar powered outdoor lighting device illustrated in FIG. 4; FIG. 5 illustrates a side view of the mounting plate of the solar powered outdoor lighting device illustrated in FIG. 1; FIG. 5a illustrates an overhead view of the dome of the solar powered outdoor lighting device illustrated in FIG. 5; FIG. 5b illustrates a perspective view of the underside of the dome of the solar powered outdoor lighting device illustrated in FIG. 5; FIG. 5c illustrates a perspective view of the topside of the dome of the solar powered outdoor lighting device illustrated in FIG. 5; FIG. 6 illustrates an overhead view of the electronic circuit of the solar powered outdoor lighting device illustrated in FIG. 1; 2920689vl 11 2016102225 23 Dec 2016 FIG. 6a illustrates a side view of the electronic circuit of the solar powered outdoor lighting device illustrated in FIG. 6; FIG. 7 illustrates a perspective view of the base assembly of the solar powered outdoor lighting device illustrated in FIG. 1; FIG. 7a illustrates a side view of the base assembly of the solar powered outdoor lighting device illustrated in FIG. 7; FIG. 7b illustrates an overhead view of the base assembly of the solar powered outdoor lighting device illustrated in FIG. 7; FIG. 8 illustrates a cross sectional side view of the battery housing of the solar powered outdoor lighting device illustrated in FIG. 1; FIG. 8a illustrates a side view of the battery housing of the solar powered outdoor lighting device illustrated in FIG. 8; FIG. 8b illustrates a perspective view of the battery housing of the solar powered outdoor lighting device illustrated in FIG. 8; FIG. 9 illustrates a side view of a solar powered outdoor lighting device according to a second embodiment of the present invention; and FIG. 10 illustrates a cross sectional side view of a solar powered outdoor lighting device according to a third embodiment of the present invention.

DETAILED DESCRIPTION OF THE DRAWINGS 2920689vl 12 2016102225 23 Dec 2016

The following detailed description relates to a preferred embodiment of the invention illustrated in the drawings, and it should be appreciated that it is not to be regarded as limiting. FIG. 1 illustrates a side elevation of a lighting device 10. The lighting device 100 includes a housing 100 comprising a dome 110 coupled to a main body 120. The main body 120 is secured to a pole 130. FIG. 2 shows a cross-sectional view of the lighting device 100 shown in FIG. 1. The lighting device 100 further includes a solar panel 140 provided under the domed housing 110 mounted atop a raised annular edge 154 of the mounting plate 150. The mounting plate 150 is positioned within a cavity 160 defined by the dome 110 and the main body 120. The mounting plate 150 is supported on a flange 122 extending around an inner edge of the main body 120.

The device 10 further includes an electronic circuit board 180 including an integrated lighting element 182 located within a recess 152 on an underside of the mounting plate 150.

The lighting element 182 comprises multiple light emitting diodes 184 mounted at various angles from 1° to 90° from horizontal to project light down and/or outwards from the device 10. A person skilled in the art will appreciate that the circuit board 180 and lighting element 182 could also be mounted within the main body 120.

The lighting device 10 also includes a rechargeable battery 190 electrically connected to the solar panel 140 housed within a battery housing 192 located in the cavity 160. The rechargeable battery 190 can be any 2920689vl 13 2016102225 23 Dec 2016 rechargeable battery suitable for discharging and recharging such as a lithium ion battery or a nickel cadmium battery, for example. A base assembly 200 is received within the cavity 160 and releasably engages the battery housing 192. As shown, the battery housing 192 and base assembly 200 are coupled together by a bayonet type twist fitting under pressure of a flat compression sealing ring 210 that stops dislodgement of the battery housing 192 from the base assembly 200. The device 10 also includes a second flat compression sealing sing 220 provided between the main body 120 and the base assembly 200 to form a water tight seal.

The device 10 further includes a sealing collar 132 fitted between the main body 120 and the pole 130. As can be seen, the collar 132 includes smaller inner lip 134. This small inner lip 134 compresses an O-ring (not shown) against the main body 120 to create a watertight seal.

Referring to FIGs. 3-3c, the main body 120 is shown to have a generally funnel shape. The outer periphery of the main body 120 defines a lip 122 adapted to engage with a reciprocally shaped groove 114 in dome 110 (shown in FIG. 4) to form a seal to prevent the ingress of liquid and dust.

At least one aperture 124 is formed at a narrow end of the main body 120 for receiving screws, bolts or other fastening means suitable for securing the main body 120 to a pole 130.

The main body 120 further includes premoulded holes 125 for receiving cutting screws to secure the main body 120 to a base cap such as the pole 130. 2920689vl 14 2016102225 23 Dec 2016

The main body 120 further includes locking members 126 which engage with apertures 112 formed in the dome 110 to lock the main body 120 and the dome 110.

As seen in FIGs. 3a-3c, the main body 120 also includes moulded pins 127 that complementarily fit with the solar panel mounting plate 150. The moulded pins 127 in combination with the mounting plate 150 stop the solar panel 140 moving or rotating in situations of expansion when the dome may move slightly. The moulded pins 127 also allow the light source to be aligned identically each time especially when using LED’s only on one side of the light as these points make the mounting plate 150 centre to one of the premoulded holes 125 that match with the pole 130. FIGs. 4-4b illustrate the dome 110 from various perspectives. As shown in plan view in FIG. 4a, the dome 110 has a spherical cross section. The dome 110 is typically constructed of a clear material such as clear polycarbonate but can be any suitable material.

Turning FIG. 4a, the dome 110 includes at least one aperture 112 which receive complementarily shaped protrusions located on the main body 126 (shown in FIG. 1 and 3). These protrusions 126 and apertures 112 engage and lock the main body 120 and dome 110 to form the housing 100.

As can be seen in the cross section in FIG. 4b, the outer edge of the dome 110 includes the groove 114 adapted to reciprocally receive the lip 122 of the main body 120 forming a sealing area offering slight movement when impacted using a high UV rated flexible and durable silicone rubber elastomeric sealant adhesive with a service temperature of -50°C to +205°C 2920689vl 15 2016102225 23 Dec 2016 preventing ingress of water, moisture and dust into the cavity 160 especially after being impacted or exposed to the elements.

While the dome 110 is depicted as having a rounded top, a person skilled in the art will appreciate that the dome 110 could also be flat or umbrella shaped. FIG. 5 further illustrates the mounting plate 150. The mounting plate 150 is a substantially circular plate with a raised annular edge 154. The solar panel 140 is mounted on top of the raised annular edge 154 of the mounting plate 150. This allows the solar panel 140 to sit as high as possible within the device 10. Generally, the solar panel 140 is positioned above the join between the main body 120 and the dome 110 so that the solar panel 140 is not shaded or obscured by other components of the device 10.

The raised annular edge 154 of the mounting plate defines a space under the solar panel 140. The space provides air flow to prevent the solar panel from overheating during operation as well as providing space to allow wiring (not shown) from the solar panel 140 to the circuit board 180 and down to the battery 190.

While the illustrated embodiment includes an internal battery, a person skilled in the art will appreciate that the device can be powered by an external power source, such as a 12V DC power source for example.

As shown in FIGs. 5a-c, the underside of the mounting plate 150 contains the recess 152 which receives the electronic circuit 180 (shown in FIG. 2). The mounting plate further includes a slot 156 for receiving a member to secure the circuit board 180 and lighting elements 182. 2920689v1 16 2016102225 23 Dec 2016

The mounting plate also includes complementarily fitting grooves 158 which are adapted to engage with the moulded pins 127 of the main body 120. FIGs. 6 and 6a further illustrate the circuit board 180 and lighting element 182 including multiple LEDs 184. Each LED 184 is mounted to the annular printed circuit board 180 which is received in the recess 152 of the mounting plate 150 as described above. The LEDs 184 are positioned around the periphery of the electronic circuit 180 at various angles from 1° to 90° from horizontal and light down and/or outwards ensuring no diffusion or reflection is required for full light emitting efficiency from the housing 100.

The annular shape of the circuit 180 allows the LEDs 184 to be sufficiently spaced to prevent overheating and to direct light effectively out of the housing 100.

While the LEDs 184 in FIG. 6 are spaced evenly around the periphery of the circuit 180, a person skilled in the art will appreciate that the LEDs 184 can also be arranged in a number of different configurations. For example, the LEDs 184 may only be spaced around half of the circuit 180 to provide lighting in a single direction. Furthermore, an additional circuit (not shown) including LEDs can be mounted in a lower portion of the main body 120. FIG. 6a illustrates the circuit 180 in a side elevation and shows a right angled member 186 which is received in the slot 156 on the mounting plate 150 to secure the circuit 180. FIGs. 7-7b further illustrate the base assembly 200 in various views. As shown, the base assembly 200 has a generally disc-shaped annular body 202 2920689v1 17 2016102225 23 Dec 2016 with a raised collar 204. The collar 204 defines an aperture which receives the battery housing 192. On an inside edge 206 of the collar 204 there are locking members 208 which secure the base assembly 200 to the battery housing 192 in a bayonet type twist fitting. FIG. 8 and 8a further illustrate various views of the battery housing 192. The battery housing 192 has a substantially cylindrical hollow body within which the battery 190 is received.

The cross sectional view of the battery housing 192 in FIG. 8 shows internal guides 194 that guide the battery 190 into the battery housing 192. These guides 194 also rest against the edges of the battery 190 and prevent the battery 190 from moving.

As shown in FIG. 8 and 8a, the outside of the battery housing 192 includes a battery holder sealing compression ring 195 and flanges 196 that extend around the body of the battery housing 192 and are adapted to engage the locking members 208 of the base assembly 200 in a bayonet type twist fitting arrangement. A hydroscopic vent 198 is formed at an end of the battery housing 192. The hydroscopic vent 198 prevents pressure from building up within the battery house 192 and allows air to circulate around the battery 190. FIG. 9 illustrates a lighting device 20 according to a further embodiment of the present invention. The lighting device 20 is identical to the lighting device 10 described in FIGs. 1-8 with the exception of the dome 230. In place of the hemispherical dome 110 of lighting device 10, dome 230 is a generally lampshade or umbrella shape. 2920689vl 18 2016102225 23 Dec 2016 FIG. 10 illustrates a lighting device 30 according a further embodiment of the present invention. The lighting device 30 is identical to the lighting device 10 described in FIGs. 1-8 with the exception of the electronic circuit 240 and the mounting plate 250. The recess 252 of the mounting plate 250 has a larger diameter relative to the recess 152 of the mounting plate 150 described in FIG. 2. As a result, a larger diameter electronic circuit 240 can be fitted to the device 30 providing either additional LEDs 244 or LEDs 224 spaced further apart around the periphery of the circuit 240. A person skilled in the art will appreciate a variety of different LEDs can be used in the lighting device. For example, the LEDs can be coloured, wildlife/marine friendly and flashing or static.

The lighting device 10 further comprises a control circuit (not shown) for controlling an operation of the lighting element 182. The control circuit configured can be configured to control an emitted light intensity of the lighting element 182 preset at various intensities in advance in consideration of a geographical location of the solar powered outdoor lighting device 10.

The control circuit monitors an output voltage of the solar panel 140 to determine when the lighting element 182 is to be operated by reverse voltage and/or PE cell type configuration.

The control circuit also regulates output voltage and current of the solar panel 140 to achieve optimal power output for regulated recharge control of the battery 190.

Advantageously, some embodiments of the lighting device are completely waterproof and submersible. 2920689vl 19 2016102225 23 Dec 2016

Another advantage of some embodiments of the lighting device is that all light illuminated from the light emitting diodes is focused directly out of the device with little to no spill inwards to the device. As a result, the lighting device does not require a diffuser. A particular advantage of some embodiments of the invention is that none of the electronic or internal wiring is subject to water or moisture and therefore are less likely to corrode or short.

Further advantageously, in some embodiments the battery housing acts as an internal reflector for reflecting light reflecting back off the clear polycarbonate housing.

In this specification, adjectives such as first and second, inner and outer, left and right, top and bottom, and the like may be used solely to distinguish one element or action from another element or action without necessarily requiring or implying any actual such relationship or order. Where the context permits, reference to an integer or a component or step (or the like) is not to be interpreted as being limited to only one of that integer, component, or step, but rather could be one or more of that integer, component, or step etc.

The above description of various embodiments of the present invention is provided for purposes of description to one of ordinary skill in the related art. It is not intended to be exhaustive or to limit the invention to a single disclosed embodiment. As mentioned above, numerous alternatives and variations to the present invention will be apparent to those skilled in the art of the above teaching. Accordingly, while some alternative embodiments have 2920689v1 20 2016102225 23 Dec 2016 been discussed specifically, other embodiments will be apparent or relatively easily developed by those of ordinary skill in the art. The invention is intended to embrace all alternatives, modifications, and variations of the present invention that have been discussed herein, and other embodiments that fall within the spirit and scope of the above described invention.

In this specification, the terms ‘comprises’, ‘comprising’, ‘includes’, ‘including’, or similar terms are intended to mean a non-exclusive inclusion, such that a method, system or apparatus that comprises a list of elements does not include those elements solely, but may well include other elements not listed. 2920689vl

Claims (5)

1. A solar powered outdoor lighting device comprising: a solar panel; a battery electrically connected to the solar panel; a mounting plate, the solar panel located on the mounting plate; a lighting element electrically connected to the battery and located on the mounting plate; a housing within which the solar panel, the lighting element, and the mounting plate are positioned and adapted to be mounted to a post.

2. The solar powered outdoor lighting device of claim 1, the housing comprising a dome and a body, wherein a lip and a recess cavity provided between the dome and the body form a sealing area preventing substantial ingress of water, moisture and dust into the cavity.

3. The solar powered outdoor lighting device of claim 1 or claim 2, wherein the lighting element is located on an under side of the mounting plate to project light down and/or outwards from the housing.

4. The solar powered outdoor lighting device of claim 3, wherein the light sources comprise one or more light emitting diodes.

5. The solar powered outdoor lighting device of any one of claims 1-4, further comprising a control circuit for controlling an operation of the lighting element, the control circuit configured to control an emitted light intensity of the lighting element preset in consideration of a geographical location of the solar powered outdoor lighting device