An AC-DC photovoltaic device is provided, including: a photovoltaic module, a direct current side capacitor, a DC-PWM power switching circuit and a controller. The direct current side capacitor is connected in parallel with an output terminal of the photovoltaic module. An input terminal of the DC-PWM power switching circuit is connected with the output terminal of the photovoltaic module. The DC-PWM power switching circuit includes a controllable switch transistor. The controller is configured to output a switch control signal to control a switching state of the controllable switch transistor in the DC-PWM power switching circuit, to control the DC-PWM power switching circuit to output a direct current PWM wave in a case that the switch control signal is a direct current modulation signal, and output an alternating current PWM wave in a case that the switch control signal is an alternating current modulation signal.

The present invention discloses a method for constructing a universal LED bulb, a flange snap ring type LED bulb and a lamp. A heat conductive bracket (3) with a flange is used as a structure supporting main body of the bulb to establish an optical engine core member of the LED bulb. An inner snap ring (81) fixed to the heat conductive bracket (3) is used to support the optical engine core member in an auxiliary manner. The optical engine core member is composed of the heat conductive bracket (3), an optical engine module (4), the inner snap ring (81), an inner cover (6), an electric connector (11) and a light distribution optical lens (7). The optical engine module (4) is made up of an optical engine die plate, an LED chip and a relevant wiring by bonding and packaging, or is further integrated with a power supply drive chip.

An outdoor lighting system for illumination of an outdoor area, the system configured to provide dynamical control in the outdoor area, the system comprising: a plurality of luminaires configured in the outdoor area; a plurality of street devices connected with the plurality of luminaires; at least one remote processor; at least one secondary processor; a cloud to which the plurality of luminaires and the plurality of street devices are connected; and the at least one remote processor and the at least one secondary processor are connected to the cloud; wherein the plurality of luminaires and the plurality of street devices are controlled in a plurality of functional modes.

The invention provides a method and a device for greatly increasing an irradiation range of a lamp. The method is characterized as follows: firstly, a COB module LED point light source is adopted as a light source; secondly, the LED point light source is put into an incident concave surface (11) to be covered by the same, so that the LED point light source is primarily refracted by the incident concave surface (11); thirdly, a light-distribution free curved surface (12) is further arranged to cover the incident concave surface (11), so that the light ray primarily refracted by the incident concave surface (11) is subsequently refracted by the light-distribution free curved surface (12) to deflect by a large angle; after two refractions, the included angle between a position, perpendicular to an extension direction of a road, of the peak intensity and an optical axis ranges from 60 to 75 degrees and a light distribution angle in a direction in accordance with the extension direction of the road ranges from 120 to 150 degrees, whereby the illumination of one single COB module LED point light source to at least 6 lanes and illumination at an interval of at least 35 m or long-distance illumination of a high-pole lamp are realized. The method and the device of the present invention are capable of realizing the illumination of one single lamp to at least 6 lanes.

A system described herein may provide a technique for the automated detection of a particular type of lighting fixture, where a given type may refer to a particular make and/or model of the lighting fixture, bulb quantity, bulb technology, power output rating, etc. The detection may be based on measured dimming curves of the lighting fixture, which may indicate actual power consumption at varying brightness levels of the lighting fixture. One or more power consumption models may be selected, generated, and/or refined based on the measured dimming curves, and applied to other lighting fixtures sharing similar attributes and/or under similar conditions. Based on such models, a given lighting fixture may be able to automatically detect anomalous behavior (e.g., excessive power consumption or less power consumption compared to expected power consumption) and automatically take remedial actions.

A light emitting diode (LED) fixture includes an electrical connector that is configured to receive an input signal from a constant current network that has a voltage in a range from a first voltage value to a second voltage value; an LED load; an LED driver circuit coupled to the LED load, the LED driver circuit configured to operate between a third voltage value and a fourth voltage value, wherein the third voltage value is greater than the first voltage value; and a conversion circuit coupled between the electrical connector and the LED driver circuit, the conversion circuit configured to output an electrical signal in response to the input signal from the constant current network, the electrical signal having a voltage that is between the third voltage value and the fourth voltage value.

An apparatus for mounting an electronic device to a support structure includes a coupling member, a clamp member, and a latch mechanism. The coupling member has an elongated electronic device support portion and a clamp support portion. The clamp support portion extends from one end of the device support portion in a direction substantially normal to the device support portion. The clamp member includes a base, a first arched clamp portion, a second arched clamp portion, and a hinge. The base is coupled to the clamp support portion of the coupling member. The first clamp portion has a first end attached to the base. The hinge pivotally couples the first ends of the two clamp portions such that the arch shapes of the two clamp portions oppose each other. The latch mechanism is configured to latch the second ends of the two clamp portions to the support structure.

A security lighting system for a perimeter fence includes a plurality of light fixtures. Each light fixture has a lower end secured to a vertical fence post, an upper end including a low voltage LED for generating light, an extension tube extending from the lower end of the light fixture to the upper end of the light fixture for locating the low voltage LED above top horizontal fence pipes of the perimeter fence, and a light directing element covering the low voltage LED for directing light generated by the low voltage LED in a downward direction toward the ground. Low voltage electrically conductive wiring interconnects the light fixtures to low voltage current provided by a power source. The low voltage electrically conductive wiring is strung along the top horizontal fence pipes and is exposed as it extends horizontally between the light fixtures at the top of said perimeter fence.

An elongated lighting module having an asymmetric illumination source formed from at least two rows of light emitting diodes (LEDs) that extend along the long axis of the module and are independently controllable. The illumination source is rectangular and oriented so that the rows of LEDs extend along the long axis of the module. The module has couplings at each end that allow additional modules to be interconnected to each other and to a central mount, thereby avoiding the need for a support pole having cross-arms. The lighting modules are powered via a wiring harness that extends down a support pole to a power converter stack having LED drivers to control the modules.

An electrical receptacle assemblies and methods for assembling and mounting toolless receptacle assemblies to a housing of a luminaire. The receptacle assembly includes a rotatable receptacle that has an insert portion with an electrical face configured to mate with a photoelectric device and includes an outer ring portion that has a mounting face opposite the electrical face. The mounting face is configured to mount on the housing. A locating mechanism of the receptacle assembly is configured to orient the rotatable receptacle on the housing in a desired direction for optimal positioning of the photoelectric device. A locking base is configured to receive at least a portion of the insert portion. A releasable retention member if configured to couple to the locking base and the insert portion of the rotatable receptacle for securing the receptacle assembly to the housing.