Abstract: A display device includes a display panel, a backlight unit disposed at the back of the display panel, and a back cover disposed at the back of the backlight unit, wherein the backlight unit including a base layer, a plurality of substrates disposed on the base layer and separated from each other, and light sources disposed on the substrates.

Abstract: An LED light fixture includes a heat sink structure, at least one LED board in thermal engagement with the heat sink structure, the at least one LED board having at least one LED emitter thereon, and an on-board connector on the LED board for connecting electrical wiring to the LED emitter(s). At least one enclosing member forms with the heat sink an interior space enclosing a corresponding LED board, the rigid enclosing member defining a wiring aperture therethrough in alignment with the on-board connector. The LED light fixture also has an exterior wireway structure including a one-piece duct which has an end portion engaged with the wiring aperture and forms a channel for wires to the on-board connector. The wireway structure further includes a single-piece rigid cover secured with respect to the enclosing member and enclosing the duct.

Abstract: A lighting apparatus includes a light source module and a power supply module. The light source module includes an electrical light source and a transmitter circuit configured to transmit a wireless signal containing information about the light source. The power supply module is connected to the light source module and includes a power supply circuit configured to generate electric power for the light source, a receiver circuit configured to receive the wireless signal transmitted from the transmitter circuit, and a control circuit configured to control the power supply circuit in accordance with the wireless signal received through the receiver circuit.

Abstract: In various embodiments, a light emitting diode (LED) lamp tube is provided along with a method of installing the LED tube lamp into a lighting fixture. In various embodiments, the LED tube lamp comprises: a tube; at least one LED positioned within the tube; a driver circuit positioned within the tube, the driver circuit comprising a set of electrical connecting wires; and a passage formed through at least a portion of the tube, the passage configured to receive there-through the set of electrical connecting wires. In various embodiments, the LED lamp tube comprises: a tube; at least one LED positioned within the tube; at least one end cap disposed on an end of the tube and at least one pin secured thereon wherein at least part of the pin is disposed outside of the tube and the at least one pin is electrically isolated from the at least one LED.

Abstract: A lamp including: a casing, a light source, a radiator, a front cover, and a convex lens. The front cover includes: a rotary ring, a movable ring, and a stop ring. An annular groove is disposed outside of the rotary ring. A limiting structure extends inside the annular groove and limits the rotary ring to rotate relative to the casing. The stop ring is fixed inside the rotary ring and the stop ring and the rotary ring combine to form female threads. The movable ring is disposed inside the rotary ring and convex points of the movable ring match with the female threads. Guide columns are disposed on an end part of the movable ring close to the radiator. The guide columns match with guide holes of the radiator and are adapted to axially pass through the guide holes. The convex lens is fixed on the movable ring.

Abstract: A smart portable lighting device including: at least one or a plurality artificial light sources having a high light output, the artificial light source or each of the artificial light sources being provided with an voltage-to-current electricity converter, which is capable of modulating the output of the light sources according to a given set value; a self-contained power source having a rechargeable battery for supplying electricity to the artificial light source(s) via the voltage-to-current electricity converters, characterized in that the device includes an electronic management casing, which includes a digital processing unit with attached circuits to which the converter(s) of the light source(s) and the self-contained power source are connected, the electronic management casing being configured so as to establish the main lighting phase by programming the desired lighting duration determining a constant light output, or by programming a constant light output determining the available lighting duration.

Abstract: A method for driving light adjustments, a device therefor and a light adjustable lamp including the device are disclosed. The device includes a light source driving circuit, an MCU and a temporary power supplying circuit. The MCU includes a current detecting module, an analyzing and processing module and a storage module. The analyzing and processing module obtains a connecting signal or a disconnecting signal of the light source driving circuit and thereafter extracts a stored firmware program of gradually varying brightness of a light source or stored information about a constant brightness state of the light source from the storage module for analyzing and processing, so as to generate a controlling signal of adjusting the brightness of the light source and send the controlling signal into the light source driving circuit. Then the light source driving circuit adjusts the brightness of the light source according to the controlling signal.

Abstract: The LED lamp includes a housing, an LED chip, a control module, a battery and a heater with a temperature controlled switch. The housing is composed of a front cover and a back cover. The LED chip, control module and the battery are received in the housing. The control module is electrically connected to the LED chip for driving the LED chip. The battery is electrically connected to the control module for providing alternative power to the LED chip.

Abstract: A first light source arranged behind a display field and configured to generate an elementary color or a secondary color from red, green and blue elementary colors for increasing safety of a display device having an optical display field, wherein the first light source is connected to an activation module which is configured to activate the first light source based on the desired color. A second light source is arranged behind the display field and configured to generate the elementary color or the secondary color from the red, green and blue elementary colors. The second light source is connected to the activation module which is configured to activate the second light source based on the desired color of the first light source, and a monitor is provided which is configured to identify an error or a fault on one of the light sources and to shutdown the faulty light source.

Abstract: The disclosed inventions comprise a device that may be mechanically and electrically associated with a typical lighting fixture found in a building or home, has low power consumption, provide a typical lighting when such lighting fixture is providing power to the device and comprises a battery backup to provide an emergency lighting feature when the power is out. The device may further be removed from the lighting fixture and used as a typical flashlight. The device may further be electrically and remotely associated with devices such as cell phones and systems such as alarm systems to provide emergency services.

Abstract: The present invention includes an LED lighting assembly containing: a housing; one or more solid state lighting units contained within the housing and actuated by alternating current power; a night light contained within the housing and operably communicating with the solid state lighting units, the night light actuated by direct current power in the absence of light from the solid state lighting units; one or more light emitting diodes contained within the night light; and a battery source for powering the night light in the event of power interruption. In yet another aspect of the invention, a lighting unit contains: a housing or elongated tube; one or more light emitting diodes contained within the housing or elongated tube; and a battery source contained within the housing or elongated tube, the battery source configured to selectively power the light emitting diodes with direct current energy.

Abstract: In embodiments of the present invention improved capabilities are described for systems and methods that provide for a power outage lighting management within an environment, comprising a power outage detection device adapted to detect a power outage condition and to wirelessly transmit power outage indication data to a plurality of lighting systems within the environment, where at least one of the plurality of lighting systems include an LED light source that is powered by an internal power source.

Abstract: A modular segmented street lighting device comprises an attaching member that is attachable to a street lamp pole, the attaching member comprising an electrical connector adapted to be electrically coupled to a power source associated with the street lamp pole. The modular segmented street lighting device also includes a docking member that is removably attachable to the attaching member, and comprises a power supply unit, and a load member that is removably attachable the attaching member and/or the docking member. The docking member is adapted to electrically couple the power supply unit to the electrical connector of the attaching member when the docking member is attached to the attaching member. The load member is adapted to electrically couple the lighting device to the power supply unit when the load member is attached to the attaching member and/or the docking member.

Abstract: A lawn or patio umbrella with an integral lighting system that utilizes cold cathode ray tubes, light emitting diodes (LED's), or florescent lights, to provide relatively bright outdoor light for reading and other activities that require relatively high light intensities is provided. In one embodiment, a modular, electrically powered lawn or patio umbrella in which lighting systems, such as those utilizing cold cathode tubes, LED's, or florescent lights; cooling systems, such as those utilizing electric fans or misting systems; and motorized retraction systems; can be selectively interchanged is provided.

Abstract: The invention relates to an emergency light device for marine use comprising a housing accommodating an electronic circuit, a least one transparent dome, and a first and a second shell member, said electronic circuit comprising at least one light emitting diode provided in the at least one transparent dome, an electrical power supply comprising at least one battery of the AA, AAA or AAAA type, and at least one operating switch, said emergency light characterized in that the housing has a width which is substantially larger than the height, preferably the width is at least double or triple the height.

Abstract: A lighting system includes a low-profile LED driver box with quick connect LED drivers that are accessible through service doors, panels or plates. The LED driver box attaches to a ceiling mount to support or suspend an LED light fixture. The LED light fixture is suspended from the LED driver box through a power-feed suspension mechanism that includes at least one direct current power conductor cable to power to the LED light fixture. The LED light fixture includes one or more linear arrays of LEDs. The system also includes a controller or dimming circuit for controlling light output and/or a backup battery for providing power to the LED light fixture in the event of a power failure.

Abstract: A self cooling light effects device for use in a standard light bulb socket having a socket adaptor, surface embedded LEDs as means to generate light effects, means to control light effects, and means for cooling. Fiber optic cables provide further light effects. Means to control 5 light effects may include a logic board. Means for cooling may be any combination of fans, heat sinks, heat pipes, thermoelectric cooling, a heat conductive filler, and a heat conductive housing.

Abstract: Provided is a brilliant Humiliation light fixture using high efficiency white LEDs in a strip design that can replace many conventional single or multiple tube fluorescent lighting fixtures. This LED lighting fixture provides benefits in lower installation cost, lower cost of ownership, lower room heating, higher illumination availability, higher efficiency, elimination of faculae, flexibility in re-layout lighting and avoidance of hazard waste. The lighting fixture are not to be confused with “LED fluorescent tubes” which is a name common in the industry to describe a fluorescence tube shape containing a linear array of LEDs that is designed to replace individual fluorescent tubes.

Abstract: An illumination system integrateable into or retrofit onto a circuit panel breaker box. The system may include a light source, a power supply, and a switch to activate a light when the panel cover is removed, or when the line power to the breaker box is interrupted, or when the specific breaker for the light in the area of the panel is tripped. The system may include a light external to the breaker box to provide assistance in locating the box in a power-outage or tripped breaker situation, a light within the panel cover recess with a switch that activates the light when the panel cover door is opened to provide illumination for assessing the status of the breakers, and a light behind the panel cover with a switch that activates the light when the panel cover is removed to access the wiring and breakers within the box.

Abstract: In accordance with certain embodiments, interior spaces are illuminated with a combination of harvested sunlight and artificial light emitted by one or more light-emitting elements.

Abstract: A compact emergency lighting system installed or preinstalled into a standard component of a building, comprising: at least one tiny and high flux luminary, such as a LED, which is installed on at least one side of the standard building component and powered by a battery backing up and charging unit coupling with an AC power supply. It is relatively simple in configuration, low in cost, easy to install, more durable, space-saving, causing minimal disruption to the outlook and design of the premises and provides with an extended operation time and reduced recharging time.

Abstract: An emergency lighting device includes an internal battery, a switching mechanism, and one or more light sources. The light sources are electrically coupled to the internal battery through the switching mechanism. The switching mechanism includes a first contact and a second contact. Additionally, the switching mechanism is configured to receive an external mechanical disconnect male jack to electrically disconnect the light sources from the internal battery. In certain embodiments, the emergency lighting device is also electrically coupled to an external power source and includes a circuit breaker for providing power to the light sources from the external power supply during normal operation and for automatically providing power to the light sources from the internal battery in the event that power from the external power source fails.

Abstract: A vehicular LED lamp monitoring/controlling system includes a vehicular LED lamp having first and second LEDs. A selection/control unit is connected to and controls separate activation of the first and second LEDs and is connected to a malfunction detecting unit that detects operation of the first and second LEDs. The second LED is activated when the first LED operates abnormally. A power control unit can send a control signal to the selection/control unit to control luminance of each of the first and second LEDs. A vehicle speed monitoring unit connected to the power control unit reads a speed of a vehicle on which the vehicular LED lamp is mounted. When the vehicle is moving, the first or second LED provides normal luminance. When the vehicle is not moving, the first or second LED provides reduced luminance.

Abstract: In embodiments of the present invention improved capabilities are described for systems and methods that provide for a power outage lighting management within an environment, comprising a power outage detection device adapted to detect a power outage condition and to wirelessly transmit power outage indication data to a plurality of lighting systems within the environment, where at least one of the plurality of lighting systems include an LED light source that is powered by an internal power source.

Abstract: A safety unit for mounting in a wall defining a part of a building space has a tubular housing containing an emergency load such as a light sized to fit within the housing, said emergency load including a base and a light-emitting element. An actuator mechanism such as a motor carried on the housing provides force to the base responsive to electrical power to translate the base to deploy the emergency load within the building space. A preferred embodiment includes a cover and a cover-operating mechanism receiving force from the actuator to remove the cover as the load deploys.

Abstract: According to various embodiments of the invention, an LED lighting system is providing having a replaceable driver module. In some embodiments, the replaceable driver module comprises a component that is physically attachable to an LED illumination module, whereby the attached components have a combined physical profile dimensioned for installation in a pre-existing light fixture. In further embodiments, the combined system's dimensions allow it to be installed in pre-existing fluorescent fixtures without requiring rewiring of the fixtures. In some embodiments, the LED driver module may be configured to condition power received from a fluorescent light ballast to drive the LEDs such that a pre-existing fluorescent ballast does not need to be removed. In other embodiments, the LED driver may be configured to condition main power such that a pre-existing fluorescent ballast may be removed.

Abstract: An LED lamp includes an optical part, a heat dissipation member and an electric part. The optical part includes a hollow light penetrable tube and an LED module received in the tube. The heat dissipation member is received in the tube to mount the LED module thereon. The electric part include a circuit board and a rechargeable battery arranged in the tube, and two end covers arranged at two opposite ends of the tube. The LED module is provided with at least one first LED and at least one second LED. The at least one first LED and the at least one second LED cooperatively function as a main light source to provide normal illumination when an external AC power source is supplied normally. The at least one second LED independently function as an auxiliary light source to provide emergency illumination when the external AC power source is interrupted.

Abstract: An alarm device includes: a detection device which detects an occurrence of an abnormal condition within a monitoring area; a transmission device which transmits an alarm signal when the detection device detects the abnormal condition; and an output device which, after the transmission device has transmitted the alarm signal, outputs an alarm after a lapse of a predetermined time after the transmission.

Abstract: Disclosed herein is a lighting system that may include a faceplate, a lighting component, a common electrical component, a battery, means for sensing that normal power is not available, means for triggering a connection between the battery and the light emitting device, means for displaying whether the battery is charged, and a means for triggering a test of the light emitting device and the battery. The faceplate may be sized to cover a single gang electrical box and may include a means to mount approximately flush to the electrical box. The lighting component may be permanently affixed to the faceplate and may include a light emitting device in a first portion of the faceplate such that when illuminated light may emit away from the electrical box.

Abstract: An emergency lighting device includes an internal battery, a switching mechanism, and one or more light sources. The light sources are electrically coupled to the internal battery through the switching mechanism. The switching mechanism includes a first contact and a second contact. Additionally, the switching mechanism is configured to receive an external mechanical disconnect male jack to electrically disconnect the light sources from the internal battery. In certain embodiments, the emergency lighting device is also electrically coupled to an external power source and includes a circuit breaker for providing power to the light sources from the external power supply during normal operation and for automatically providing power to the light sources from the internal battery in the event that power from the external power source fails.

Abstract: A light assembly comprising a globe, an electric grid powered lighting element disposed within the globe, a solar powered lighting element disposed within the globe, a solar panel coupled to the solar powered lighting element for collecting light and generating power for the solar powered lighting element, a rechargeable power source coupled to the solar panel and the solar powered lighting element for storing the power generated by the solar panel and powering the solar powered lighting element, a first sensor for detecting an ambient light level and activating the solar powered lighting element when the ambient light level is below a desired ambient light level, and, a second sensor for detecting output levels of the solar powered lighting element and activating the electric grid powered lighting element when the output level of the solar powered lighting element is below a desired output level.

Abstract: A temperature measurement system is provided for a light emitting diode (LED) assembly that includes an LED having two semiconductors joined together at an LED junction. The system includes a temperature sensor operatively connected to the LED assembly at a remote location that is remote from the LED junction. The temperature sensor is configured to measure a temperature of the LED assembly at the remote location. A temperature calculation module is operatively connected to the temperature sensor for receiving the measured temperature at the remote location from the temperature sensor. The temperature calculation module is configured to determine a junction temperature at the LED junction based on the measured temperature a the remote location.

Abstract: A lighting apparatus includes a primary lighting source powered by from a facility A-C power source, and backup LED lighting source powered by batteries.

Abstract: Modular lamp system comprises a base unit comprising a power supply, and at least one pair of external electrical contacts arranged on said base unit and electrically connected with said power supply; and at least one light unit comprising at least one first pair of external electrical contacts, arranged on said light unit and arranged to mate with the at least one pair of electrical contacts of the base unit or another substantially identical unit, at least one second pair of external electrical contacts, arranged on said light unit and arranged to mate with the at least one first pair of electrical contacts of another substantially identical unit, and at least one LED lamp arranged on said light unit, said at least one first pair of external electrical contacts and said at least one second pair of external electrical contacts, and said lamp being electrically connected with each other.

Abstract: A light fixture comprises a housing configured to store a plurality of light bulbs therein, wherein at least one of the light bulbs is located in a non-illumination position within the housing. The light fixture may also comprise an openable door such that at least one light bulb is coupled to the door. The light fixture may also comprise an actuatable mechanism that releases the light fixture from a fixed position when actuated to enable variable positioning of the light fixture.

Abstract: Systems and methods for backing up LEDs are provided. In one embodiment, an LED backup system includes an LED backup controller operable to select from a plurality of power sources to supply electrical energy to a set of LEDs. The plurality of power sources includes a primary power source and a battery. The LED backup controller is adapted to be in selective electrical communication with the primary power source via a first electrical path. The LED backup controller is also adapted to be in electrical communication with the primary power source via a second electrical path. The LED backup controller is operable to select the battery to supply electrical energy to the set of LEDs in response to a failure of the LED backup controller to electrically communicate with the primary power source via the second electrical path.

Abstract: Systems and methods for backing up LEDs are provided. In one embodiment, an LED backup system includes an LED backup controller operable to select from a plurality of power sources to supply electrical energy to a set of LEDs. The plurality of power sources includes a primary power source and a battery. The LED backup controller is adapted to be in selective electrical communication with the primary power source via a first electrical path. The LED backup controller is also adapted to be in electrical communication with the primary power source via a second electrical path. The LED backup controller is operable to select the battery to supply electrical energy to the set of LEDs in response to a failure of the LED backup controller to electrically communicate with the primary power source via the second electrical path.

Abstract: An LED lighting device is presented for both general illumination and emergency backup lighting. The device has an outer bulb shell with air vents to release heat. A metal threaded base is adapted to fit into a standard incandescent bulb socket and to allow electrical current to flow into the device. Housed within the outer bulb shell, and removably connecting the shell to the metal base is a lighting assembly. The lighting assembly is a cylindrical structure comprising bright LEDs arranged along its outer surface, some of which are powered via wall outlet power from the metal base of the device, while others utilize an internal battery power source housed within the assembly. The battery powered LEDs may be remotely activated by a remote control means. Use of the remote control sends a signal to a signal receiving means on or within the device that directs the backup LEDs to illuminate.

Abstract: An illumination device comprising: at least one light emitting device (106); an internal power source (208); an electrical interface (112) for electrically connecting said illumination device to an external power supply (210); a thermal interface (114) for thermally connecting said illumination device to an external heat sink (121); and a circuitry for operating said illumination device in a first mode when disconnected from at least one of said external power supply (210) and said external heat sink (121), in which first mode said at least one light emitting device (106) is powered by said internal power source (208), and in a second mode when said illumination device is connected to said external power supply (210) and said external heat sink (121), in which second mode said at least one light emitting device (106) is powered by said external power supply (210), and wherein a first maximum luminance in said first mode is restricted relative a second maximum luminance in said second mode.

Abstract: A multifunctional emergency lighting device includes at least one base formed of a heat sink, at least one LED lighting module, at least one emergency LED lighting module, a power control circuit, and at least one backup power supply device. The LED lighting module and the emergency LED lighting module are both mounted in the base. The power control circuit is connected to the LED lighting module and the emergency LED lighting module for converting AC to DC current for charging the backup power supply device and powers the LED lighting module and the emergency LED lighting module. In case of power failure of the electric main, the backup power supply device supplies electrical power to the power control circuit for powering the emergency LED lighting module in order to activate the emergency lighting of the emergency LED lighting module.

Abstract: A blackout light bulb has a housing with an Edson screw at one end for screwing into a light fixture socket and a plurality of spaced apart LEDs mounted to its opposite end. A flexible stalk is connected to the housing between the Edison screw and the LEDs and can be bent into a selected shape for positioning a free end of the stalk as desired. A circuit board in the housing has an electronic circuit connected to the Edison screw, to the LEDs and to a photo cell at the free end of the stalk. A rechargeable battery in the housing is connected to the circuit board so that it is charged under certain normal conditions and so that it lights up the LEDs under other blackout conditions.

Abstract: A blackout light bulb has a housing with an Edson screw at one end for screwing into a light fixture socket and a plurality of spaced apart LEDs mounted to its opposite end. A flexible stalk is connected to the housing between the Edison screw and the LEDs and can be bent into a selected shape for positioning a free end of the stalk as desired. A circuit board in the housing has an electronic circuit connected to the Edison screw, to the LEDs and to a photo cell at the free end of the stalk. A rechargeable battery in the housing is connected to the circuit board so that it is charged under certain normal conditions and so that it lights up the LEDs under other blackout conditions.

Abstract: A storm light includes a housing having walls, a light positioned on the housing, and a battery electrically connected to the light. A control unit situated in the housing is electrically connected to the light and battery, the control unit having programming corresponding to ON, OFF, and AUTOMATIC modes. A mode selection switch is positioned on the housing and electrically connected to the control unit, the mode switch being movable between positions corresponding to respective modes. An electrical plug is mounted to the housing and electrically connected to the control unit. The control unit includes programming initiated when the mode switch is at the ON position that causes the light to be energized by AC power if the plug is connected to AC power and the AC power is available and that causes the light to be energized by the battery if AC power is unavailable.

Abstract: A high intensity dimmable LEDs luminaire with emergency ballast for car parks for use with fixed or dimmable output comprising a semi-concave shell, characterized in that it has a passage at the center of the skeleton having an inverted “U” shape to accommodate an AC current source, emergency ballast, a set of batteries and electrical harness and in that it has at its concave side ends, a plurality of PCB or MCPBC card and metal heat dissipating elements.

Abstract: A wireless convenience lighting system, comprises a base unit, the base unit connectable to an AC power supply, the base unit having a transmitter structure emitting at least one signal indicating one of an AC power loss or the AC power on, a remote lighting unit having a light source, and auxiliary power supply and a receiver structure, the receiver structure receiving the signal from the base unit, the base unit wirelessly activating the light source of the remote lighting unit when the AC power is lost.

Abstract: Daylighting systems and methods with auxiliary lighting fixtures are disclosed. Some embodiments disclosed herein provide a daylighting apparatus including a tube having a sidewall with a reflective interior surface and an auxiliary light fixture. The tube can be disposed between a transparent cover positioned to receive daylight and a diffuser positioned inside a target area of a building. In certain embodiments, the tube is configured to direct the daylight transmitted through the transparent cover towards the diffuser. The auxiliary light fixture can include a lamp disposed within the tube and a light control surface configured to reflect light exiting the lamp towards the diffuser and to transmit daylight propagating through the tube from the direction of the transparent cover. The lamp can be disposed on the sidewall of the tube.

Abstract: A multi-function replaceable modular LED lamp includes a lamp base, a lampshade, a plurality of LED modules, a power supply control circuit board, and a detector. The lampshade is disposed on the lamp base. The plurality of LED modules is detachably disposed in the lamp base and electrically connected to the power supply control circuit board. The detector is detachably disposed on the lamp base and electrically connected to the power supply control circuit board. The detector has a specific function, such as, an earthquake detection, a human body detection, a disaster detection, an alarm detection and the like. The LED modules, the detector and the other parts of the present invention are replaceable with ease, which has the advantages of environmental protection and energy saving.

Abstract: A luminary has a central lamp, an emergency lamp and a control box. The emergency lamp is ring-shaped and mounted around a light-emitting end of the central lamp and has a base and a circuit board. The circuit board has an LED set and a cable set connected to the LED set. The control box is electrically connected to cable set of the circuit board, adapted to connect to an AC power and has a battery. The control box drives the LED set when an outage of the AC power occurs. Since emergency illumination is provided by the emergency lamp and is independent of normal illumination provided by the central lamp, battery power for emergency illumination can be kept from being quickly consumed by the central lamp that is usually power-consuming.

Abstract: A fire emergency escape guiding apparatus includes at least one laser guider installed at a predetermined position of an escape passage, and a light beam generated by the laser guider has the features of a quick response and a low divergence and provides a clear vision in a dark and smoky environment with a low visibility, such that escape guiding signs and routes can be provided immediately and clearly in the escape passage with the low visibility when a fire breaks out, so as to achieve the effects of improving the rescue rate and reducing casualties.

Abstract: A solar-powered LED street light that can immediately report its power data. The disclosed LED street light has a solar cell, a switch power supply unit, and a power cable data communicating unit. The mains power cable of the LED street light connects to the switch power supply unit for providing it with DC power. The solar cell has a solar board, a battery and a charge controller. The charge controller can also provide the LED street light with DC power. The charge controller has a power data digital output interface for connecting with the power cable data communicating unit, outputting the power data of the solar cell to the power cable data communicating unit. Through the mains power cable, the status of solar cell of each LED lamp is monitored.