CN213177875U - Low level lamp and low level lamp lighting system - Google Patents

Abstract

The embodiment of the utility model provides a low-position lamp and a low-position lamp lighting system, the low-position lamp provided by the utility model comprises a lamp shell provided with an installation port, and a reflecting plate which is arranged at the installation port and sealed with the lamp shell; the reflector is provided with a first light source capable of emitting light. And the power supply module is positioned in the lamp shell and used for supplying power to the first light source. The utility model also provides a low level lamp lighting system, including switching power supply and above-mentioned low level lamp, a plurality of low level lamps pass through the terminal box and connect in parallel on switching power supply. The utility model provides a low level lamp sets up the first light source that can give out light at the reflector panel, and the reflector panel region except can reflecting the light that the car light shined and come can also initiatively give out light. When the vehicle runs on a road, the driver can judge the boundary of the road surface through the light emitted by the first light source, so that the probability of accidents is effectively reduced.

Description

Low level lamp and low level lamp lighting system

Technical Field

The embodiment of the utility model provides a relate to road lighting technology, especially relate to a low level lamp and low level lamp lighting system.

Background

The low-level lamp is a road lighting lamp which is installed at a height lower than the sight of a driver of a vehicle relative to a high-pole street lamp, and is used for viaducts, bridges connected with bridges and tunnels, large-scale interchange hubs and tunnel entrances and exits. The low-level lamp mainly solves the problems of low light utilization rate, light pollution and string light influencing the driving safety behavior of a driver of high-pole street lamps of an urban viaduct and large-scale high-pole high-power lamps of a large-scale interchange hub.

Among the prior art, the low level lamp is fixed on the guardrail of road both sides, and the low level lamp is provided with the reflector panel towards the direction of coming the car, and it can reflect the light that the car light shines and come. The driver can judge the road surface boundary according to the reflection of the reflector.

However, when the driver encounters weather with poor visibility, such as rain, snow, fog and the like, the driver is difficult to judge the boundary of the road surface according to the reflection of the reflector, and potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

The problem of the above-mentioned problem in order to solve prior art, be solve current low level lamp when running into sleet or weather that visibility is poor promptly, the driver is difficult to judge the boundary on road surface according to the reflection of light of reflector panel, has the potential safety hazard.

According to the utility model discloses an aspect provides a low level lamp, include:

a lamp housing provided with a mounting opening;

the reflector is arranged at the mounting opening and sealed with the lamp shell; the reflector is provided with a first light source capable of emitting light;

and the power supply module is positioned inside the lamp shell and used for supplying power to the first light source.

In an optional implementation manner, the first light source is a lamp bead, the reflector is provided with a through hole penetrating through the thickness of the reflector, and the tail of the lamp bead penetrates through the through hole of the reflector and extends into the lamp housing.

In an optional implementation manner, the number of the lamp beads is multiple, and the multiple lamp beads are distributed on the reflector at intervals.

In an optional implementation manner, the lamp housing includes a front cover and a rear housing, the front cover is disposed on the rear housing and sealed with the rear housing, the front cover and the rear housing form a long-strip box-shaped structure, and the reflector is disposed at one end of the rear housing along a length direction and sealed with the rear housing.

In an alternative implementation, the rear housing is made in one piece by die-casting.

In an optional implementation manner, the lighting device further comprises a second light source mounted at the other end of the rear shell in the length direction, and the power supply module can supply power to the second light source.

In an optional implementation manner, the front cover is a transparent cover plate made of a transparent material, a plurality of third light sources are arranged in the lamp housing, the plurality of third light sources are arranged at intervals along the length direction of the lamp housing, and a part of the transparent cover plate, which is overlapped with the top of the second light source, is provided with a light blocking layer;

the power supply module is also used for supplying power to the plurality of third light sources.

In an optional implementation manner, the light blocking layer is a light blocking pattern printed on the surface of the transparent cover plate in a silk-screen printing manner.

In an optional implementation manner, the power supply module includes a current adjusting unit, configured to adjust a current magnitude output by the power supply module.

According to another aspect of the embodiments of the present invention, there is provided a low-level lamp lighting system, comprising a switch and a plurality of low-level lamps as described above;

the plurality of low-level lamps are connected in parallel to the switching power supply through a junction box.

As can be understood by those skilled in the art, the utility model discloses a low lamp is including the lamp body that is provided with the mounting hole, and the reflector panel is installed in the installing port of lamp body and sealed with the lamp body, and the reflector panel is provided with the first light source that can give out light. The lamp shell is internally provided with a power supply module used for supplying power to the first light source. Therefore, when the vehicle runs on the road, the driver can judge the boundary of the road surface through the light emitted by the first light source, and the probability of accidents is effectively reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural view of a low-position lamp according to a first embodiment of the present invention;

FIG. 2 is a schematic diagram of the exploded structure of FIG. 1;

FIG. 3 is a schematic diagram of a low position lamp in the prior art;

FIG. 4 is a schematic diagram of a prior art low position lamp lighting system;

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

fig. 6 is a schematic structural view of a low-position lamp lighting system according to a second embodiment of the present invention;

fig. 7 is a partially enlarged schematic view of a portion B in fig. 6.

Description of reference numerals:

1-a low-level lamp;

11-a lamp housing;

111-a mounting port;

112-a transparent cover plate;

1121-light blocking layer;

113-a rear shell;

12-a reflector;

13-a first light source;

14-a second light source;

15-a third light source;

16-a scaffold;

17-a brim;

2-a switching power supply;

3-a junction box;

4-constant current power supply.

Detailed Description

First of all, it should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be modified as needed by those skilled in the art to suit particular applications.

Next, it should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "inside", "outside", and the like are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that a device or member must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.

Among the prior art, the low level lamp is fixed on the guardrail of road both sides, and the low level lamp is provided with the reflector panel towards the direction of coming the car, and when the vehicle was close to or passed in, the reflector panel can reflect the light that the car light shined and come, and the driver can judge the boundary on road surface according to the light of reflector panel reflection. However, when the driver encounters weather with poor visibility, such as rain, snow, fog and the like, the driver is difficult to judge the boundary of the road surface according to the reflection of the reflector, and potential safety hazards exist.

Through repeated thinking and verification, the inventor finds that if the light source is arranged on the reflector of the low-position lamp, the light source can actively emit light when encountering weather with poor visibility, such as rain, snow, fog and the like. When a vehicle runs to the vicinity, the reflector reflects the light irradiated by the vehicle lamp on one hand, and the light source actively emits light on the other hand. Compared with the existing reflector, the reflector has higher brightness, is easier to be noticed by a driver, and effectively reduces the occurrence of accidents.

In view of the above, the inventor designs a low-position lamp, which includes a lamp housing, a reflector and a power supply module. The lamp shell is provided with a mounting hole, the reflector is mounted on the mounting hole and sealed with the lamp shell, and the reflector is provided with a first light source capable of emitting light. The power supply module is arranged in the lamp shell and used for supplying power to the first light source. Like this, when meetting the weather of visibility difference such as sleet fog, power module is the power supply of first light source, and first light source is luminous, and when the vehicle passed through, the regional light that can also initiatively give out light except that the reflection car light shines coming of reflector panel. The driver can more easily notice the installation position of the low-level lamp during driving on the road surface, so that the boundary of the road surface can be judged, and the accident probability is effectively reduced.

Example one

Fig. 1 is a schematic structural diagram of a low-level lamp 1 according to the present invention, and fig. 2 is a schematic structural diagram of an explosion of fig. 1. As shown in fig. 1-2, the utility model provides a low-position lamp 1 includes lamp body 11, reflector panel 12 and power module (not shown in the figure), and lamp body 11 and reflector panel 12 fixed connection, exemplarily, lamp body 11 is provided with mounting hole 111, and reflector panel 12 is installed at the mounting hole 111 of lamp body 11 and is sealed with lamp body 11, and for example, reflector panel 12 and lamp body 11 can pass through screw connection, and sets up the sealing washer between reflector panel 12 and the lamp body 11. The power supply module is located inside the lamp housing 11 and fixedly connected to the lamp housing 11, and for example, the power supply module and the lamp housing 11 may be connected by bonding. It is readily understood that the power supply module is used to power the light source of the low-position lamp 1.

One way of implementing the method is that the power supply module comprises a current adjusting unit, and the current adjusting unit can adjust the current output by the power supply module, so as to adjust the brightness of the light source. The present embodiment is not limited to the current adjustment unit, and for example, a dimmer may be used as the current adjustment unit.

Through setting up the current adjustment unit at power module, and then can be according to the luminance adjustment low level lamp 1 of external environment's luminance, the energy saving just can be with road brightness adjustment to being close to the luminance that suitably traveles.

With continued reference to fig. 1-2, it should be noted that the reflector 12 is located on the left side of the lamp housing 11 in the drawings, but should not be considered as a specific limitation to the protection scope, that is, the reflector 12 may also be located on the right side of the lamp housing 11, and those skilled in the art may arrange the reflector 12 to face the direction of the coming vehicle according to actual needs. The material of the reflector 12 is not limited in this embodiment, for example, a smooth-surfaced metal plate may be used as the reflector 12, and preferably, the color of the reflector 12 may be set to yellow, so as to be more noticeable to the driver.

The light reflection plate 12 is provided with a first light source 13 capable of emitting light, and the kind of the first light source 13 is not limited in this embodiment, and those skilled in the art can set the light reflection plate according to actual needs. The first light source 13 is electrically connected to a power supply module inside the lamp housing 11, and the power supply module is configured to supply power to the first light source 13, that is, the power supply module can be controlled to further control the on/off of the first light source 13.

When the weather environment is good, the first light source 13 is in a long closed state, and a driver can judge the installation position of the low-level lamp 1 and the position of the guardrail according to the lamp light reflected by the reflector 12 when the vehicle runs on a road; when encountering weather with poor visibility such as rain and snow, the power supply module supplies power to the first light source 13, the first light source 13 actively emits light, and when a vehicle runs nearby, the area of the reflector 12 can actively emit light besides reflecting light irradiated by the vehicle lamp, so that the driver can more easily notice the light. The driver can judge the boundary of the road surface according to the light rays emitted by the first light source 13, and the probability of accidents is reduced.

As shown in fig. 1-2, a possible implementation manner is that the first light source 13 may adopt a light emitting diode bead, that is, an LED bead, and in a power-on state, the light emitting diode converts electric energy into light energy to realize light emission. As can be appreciated by those skilled in the art, compared with other light sources, the LED lamp bead has longer service life and consumes less electric energy. Correspondingly, the reflector 12 is provided with a through hole penetrating the thickness of the reflector 12, and the tail of the lamp bead penetrates through the through hole of the reflector 12 to extend into the lamp housing 11 and is electrically connected with the power supply module inside the lamp housing 11.

It is easy to understand that the number of the lamp beads is not limited, and may be one or multiple, when the number of the lamp beads is one, it may be located in the middle of the reflector 12, and when the number of the lamp beads is multiple, the multiple lamp beads may be arranged in any suitable shape on the reflector 12, for example, as shown in fig. 2, the number of the lamp beads is six, and six lamp beads are arranged in a triangular shape on the reflector 12. It should be noted that a distance is arranged between adjacent lamp beads, that is, a plurality of lamp beads are distributed on the reflector 12 at intervals, so that local brightness on the reflector 12 is prevented from being too high, and when a vehicle passes through nearby, the visual line of a driver is influenced, namely, the phenomenon of dazzling is avoided.

As shown in fig. 1, the second light source 14 is disposed on the right side of the lamp housing 11, and one possible implementation manner is that an end portion is disposed on the right side of the lamp housing 11, the end portion is fixedly connected with the lamp housing 11, and the second light source 14 is disposed inside the end portion and is tightly connected with the end portion. The specific connection manner between the second light source 14 and the lamp housing 11 is not limited in this embodiment, and those skilled in the art may also use other connection manners to fix the second light source 14 at the right end of the lamp housing 11. It will be readily appreciated that the second light source 14 is electrically connected to a power supply module, i.e. the power supply module is capable of supplying power to the second light source 14.

In this embodiment, the second light source 14 is disposed, and the second light source 14 and the reflector 12 are respectively disposed at two opposite ends of the housing, so that the second light source 14 can supplement the dark spot area of the road surface to illuminate, and the road surface is illuminated more uniformly.

As shown in fig. 2, a plurality of third light sources 15 are disposed in the lamp housing 11, and one possible implementation manner is to use the lamp beads as the third light sources 15, where the plurality of third light sources 15 are disposed at intervals along the length direction of the lamp housing 11, that is, the plurality of third light sources 15 are disposed at intervals along the left-right direction in fig. 2. It will be readily understood that the number of third light sources 15 is not limiting and can be set by a person skilled in the art according to the actual needs.

By arranging a plurality of third light sources 15 in the lamp housing 11, preferably, the third light sources 15 are arranged along the length direction of the lamp housing 11, it can be understood by those skilled in the art that the third light sources 15 are main light sources of the low-position lamp 1 and are used for illuminating a road surface area right in front of the low-position lamp 1.

As shown in fig. 2, the lamp housing 11 includes a front cover and a rear housing 113, and the left and right ends and the top of the rear housing 113 are respectively provided with an opening. Illustratively, the reflector 12 is connected with the opening on the left side of the rear housing 113 in a sealing manner, for example, the reflector 12 is connected with the rear housing 113 through a screw, and a sealing ring is arranged at the connection between the reflector 12 and the rear housing 113 to achieve sealing. The second light source 14 is hermetically connected with the opening on the right side of the rear housing 113, the front cover is covered on the rear housing 113 and hermetically connected with the rear housing 113, the front cover and the rear housing 113 form a long-strip box-shaped structure, and the third light source 15 is located inside the long-strip box-shaped structure and fixedly connected with the inner wall of the rear housing 113.

By arranging the lamp housing 11 as a long-bar-shaped box-shaped structure, the reflector 12, the second light source 14 and the front cover are respectively hermetically connected with the rear housing 113, so as to protect the components inside the lamp housing 11 from the external environment. For example, when it is raining, the electronic components inside the lamp housing 11, such as the power supply module, are protected from short-circuiting due to penetration of rain water.

Preferably, the rear housing 113 is formed as a single piece, and by manufacturing the rear housing 113 as a single piece, on one hand, in the process of producing the low-position lamp 1, the assembly efficiency of the low-position lamp 1 can be improved, and the yield of products can be improved; on the other hand, compared with the rear case 113 formed by splicing a plurality of plates, the rear case 113 made into an integrated piece can improve the waterproofness of the low-position lamp 1 and reduce the water leakage problem of the low-position lamp 1. The present embodiment is not limited to the manner in which the rear case 113 is formed as an integral piece, and the rear case 113 may be formed as an integral piece by die casting, for example.

It is easy to understand that the front cover is a transparent cover plate 112 made of a transparent material, and the light emitted from the third light source 15 can pass through the transparent cover plate 112 to irradiate the outside of the low-position lamp 1. The present embodiment is not limited to a specific material of the transparent cover 112, and for example, glass may be used as the transparent cover 112.

Fig. 3 is a schematic structural diagram of a low-position lamp 1 in the prior art. As shown in fig. 3, in order to prevent partial light from entering eyes of a driver with a low vehicle body and causing hidden danger to the driving safety of the driver, a visor 17 is arranged on the low-level lamp 1, the visor 17 is positioned on the top of the low-level lamp 1 and protrudes leftwards from the outer surface of the low-level lamp 1, and partial light is blocked by the visor 17. However, the low-level lamp 1 is provided with the visor 17, which is inconvenient for a cleaning machine to clean dirt on the surface of the lamp.

Fig. 2 shows that in the present embodiment, a light blocking layer 1121 is disposed at a portion of the transparent cover plate 112 overlapping with the top of the third light source 15, and one possible implementation manner is that the light blocking layer 1121 is an opaque material disposed between the third light source 15 and the transparent cover plate 112, and the light blocking layer 1121 is adhesively connected to the cover plate.

Through overlap portion sets up the layer 1121 that is in the light between transparent cover 112 and third light source 15 mutually, can play and shelter from partial light, prevent that this partial light from directly kicking into driver's eyes, produce the influence to driver's driving safety, moreover, the outside of low level lamp 1 does not have outstanding brim of a hat 17, makes things convenient for the clearance machine to clean low level lamp 1.

Preferably, the light blocking pattern may be directly printed on the surface of the transparent cover 112 by a silk screen printing method, and the light blocking pattern is used as the light blocking layer 1121, the specific shape of the light blocking pattern is not limited in this embodiment, for example, a long strip may be printed on the surface of the transparent cover 112, the length direction of the long strip is the same as the length direction of the transparent cover 112, and the width of the long strip overlaps with a part of the upper portion of the third light source 15, so as to block a part of the light emitted from the third light source 15.

The light blocking layer 1121 is formed into a light blocking pattern printed on the surface of the transparent cover 112 by a silk screen printing method, so that the assembly process of the low-position lamp 1 is simplified, that is, the transparent cover 112 is directly arranged on the rear shell 113, so that the effect of blocking part of the light emitted by the third light source 15 can be achieved.

As shown in fig. 1-2, a bracket 16 is disposed at the bottom of the lamp housing 11, one end of the bracket 16 is detachably connected to the lamp housing 11, and the bracket 16 is connected to the lamp housing 11 by screws, for example. The other end of the bracket 16 is used to attach a road guardrail, illustratively the bracket 16 is bolted to the guardrail.

Connect low level lamp 1 and guardrail through setting up support 16, when needs are changed or are maintained low level lamp 1, can directly lift low level lamp 1 off from support 16, and then change and maintenance, easy dismounting.

In this embodiment, the reflector 12 is provided with the first light source 13 that can emit light, so that even if the low-position lamp 1 provided by this embodiment encounters weather with poor visibility such as rain and snow, the first light source 13 can actively emit light, and then the driver can determine the boundary of the road surface through the light emitted by the first light source 13, thereby effectively reducing the occurrence probability of accidents. The rear housing 113 has an integrated structure, thereby improving the assembly efficiency of the product and the waterproof performance of the low-position lamp 1. The light blocking patterns are printed on the surface of the transparent cover plate 112 in a silk-screen printing mode, the light blocking patterns are used as the light blocking layer 1121, a driver is protected from being affected by dazzling light, and in addition, the surface of the low-position lamp 1 is conveniently cleaned by a cleaning machine.

Example two

Fig. 4 is a schematic structural diagram of a lighting system of the low position lamp 1 in the prior art, and fig. 5 is a partially enlarged schematic diagram of a point a in fig. 4. As shown in fig. 4 to 5, the conventional low-position lamp 1 lighting system includes a constant current source 4 and a plurality of low-position lamps 1, for example, the number of the low-position lamps 1 is four, and four low-position lamps 1 are connected in series to the constant current source 4 through a junction box 3.

As shown in fig. 5, both terminals of the low-position lamp 1 are connected to cables located below. In the process of wiring installation of the low-position lamp 1, the situation that two wiring ends of the low-position lamp 1 are reversely connected easily occurs, so that the reversely connected low-position lamp 1 is damaged, and the rest three low-position lamps 1 cannot be lightened due to the fact that the four low-position lamps 1 are connected in series.

Fig. 6 is a schematic structural diagram of the lighting system of the low-position lamp 1 according to the present embodiment, and fig. 7 is an enlarged schematic partial diagram at B in fig. 6. As shown in fig. 6 to 7, the lighting system of the low-position lamp 1 provided by the present embodiment includes a switching power supply 2 and a plurality of low-position lamps 1 in the first embodiment.

It is easily understood that the number of the low-position lamps 1 is not limited, and those skilled in the art can design the number of the low-position lamps 1 according to actual needs. A plurality of low level lamps 1 are connected in parallel on switching power supply 2 through terminal box 3, specifically speaking, the power module inside low level lamp 1 is connected with switching power supply 2 electricity through terminal box 3, the wiring end that is located the left among the power module is connected with the cable that is located the top, the wiring end that is located the right among the power module is connected with the cable that is located the below, the condition that two wiring terminations are anti-appears in the in-process of low level lamp 1 installation wiring. Because a plurality of low level lamps 1 are connected in parallel, when one low level lamp 1 is damaged, the rest low level lamps 1 are not affected.

It should be noted that the power supply module also plays a role of stabilizing current, and those skilled in the art can understand that the switching power supply 2 is an interactive power supply, and the current provided by the interactive power supply has a certain fluctuation, and the power supply module is electrically connected with the switching power supply 2, and the switching power supply 2 supplies power to the power supply module, and then the power supply module supplies power to the light source in the low-position lamp 1, so that the phenomenon that light emitted by the low-position lamp 1 is dim can be avoided, and the brightness of the low-position lamp 1 is more stable.

In the description of the present invention, it is to be understood that the terms "top," "bottom," "upper," "lower" (if present), and the like, are used in the orientation or positional relationship shown in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The terms "first" and "second" in the description and claims of the present application and the description of the above-described figures are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A low level lamp, comprising:

a lamp housing provided with a mounting opening;

the reflector is arranged at the mounting opening and sealed with the lamp shell; the reflector is provided with a first light source capable of emitting light;

and the power supply module is positioned inside the lamp shell and used for supplying power to the first light source.

2. The low-position lamp as claimed in claim 1, wherein the first light source is a lamp bead, the reflector is provided with a through hole penetrating through the thickness of the reflector, and the tail of the lamp bead penetrates through the through hole of the reflector and extends into the lamp housing.

3. The low-position lamp as claimed in claim 2, wherein the number of the lamp beads is plural, and the plural lamp beads are distributed on the reflector at intervals.

4. A low-position lamp according to any one of claims 1 to 3, wherein the lamp housing comprises a front cover and a rear housing, the front cover is disposed on the rear housing and sealed with the rear housing, the front cover and the rear housing form an elongated box-shaped structure, and the reflector is disposed at one end of the rear housing along the length direction and sealed with the rear housing.

5. A low position light according to claim 4, wherein the rear housing is made in one piece by die casting.

6. The low-position lamp according to claim 4, further comprising a second light source installed at the other end of the rear case in the length direction, wherein the power supply module can supply power to the second light source.

7. The low position lamp as claimed in claim 6, wherein the front cover is a transparent cover plate made of transparent material, a plurality of third light sources are arranged in the lamp housing, the plurality of third light sources are arranged at intervals along the length direction of the lamp housing, and a part of the transparent cover plate, which is overlapped with the top of the second light source, is provided with a light blocking layer;

the power supply module is also used for supplying power to the plurality of third light sources.

8. The low-position light as claimed in claim 7, wherein the light-blocking layer is a light-blocking pattern printed on the surface of the transparent cover plate by silk-screen printing.

9. The low-position lamp according to any one of claims 1 to 3, wherein the power supply module comprises a current adjusting unit for adjusting the magnitude of the current output by the power supply module.

10. A low-position lamp lighting system comprising a switching power supply and a plurality of low-position lamps as claimed in any one of claims 1 to 9;

the plurality of low-level lamps are connected in parallel to the switching power supply through a junction box.

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