The present invention provides a U-shaped luminaire, comprises a lamp head module, a first glass tube, a second glass tube, a first light source board, a second light source board and a light transmission module, said lamp head module engaging said first glass tube and said second glass tube respectively, said first light source board being located within said first glass tube, said second light source board being located within said second glass tube and said light transmission module engaging said first glass tube and said second glass tube respectively.

A ceiling light LED retrofit kit is provided. The kit is configured for attachment to an existing, installed linear fluorescent tube lighting fixture. The kit includes a light panel, a first profile extending along a first longitudinal side of the existing fluorescent light fixture, and a second profile extending along a second longitudinal side of an existing light fixture. The retrofit kit light panel includes light emitting diodes. A raceway may be defined between the retrofit kit and the previously-installed fixture, in which wiring and other components may reside away from you.

A light source that is adapted to replace existing fluorescent tubes in an existing fluorescent light fixture is disclosed. The light source includes a plurality of LEDs mounted on a heat-dissipating structure, first and second plug adapters that mate with the florescent tube connectors of the fluorescent tube the light source is to replace, and a power adapter that converts power from a fluorescent tube ballast presented on the first and second plug adapters to DC power that powers the LEDs. The light source is powered from the output of the existing fluorescent ballast. The light source can utilize the existing metallic enclosure as a heat-radiating surface and/or direct air heat transfer from the surface of the heat-dissipating structure.

A light source that is adapted to replace existing fluorescent tubes in an existing fluorescent light fixture is disclosed. The light source includes a plurality of LEDs mounted on a heat-dissipating structure, first and second plug adapters that mate with the florescent tube connectors of the fluorescent tube the light source is to replace, and a power adapter that converts power from a fluorescent tube ballast presented on the first and second plug adapters to DC power that powers the LEDs. The light source is powered from the output of the existing fluorescent ballast. The light source can utilize the existing metallic enclosure as a heat-radiating surface and/or direct air heat transfer from the surface of the heat-dissipating structure.

An LED control system is provided for connection to an LED lighting system via a power line to control the LED lighting system using commands formed by manipulation of frequency and amplitude of a signal transmitted over the power line. The signal may be for example a wave or a sequence of pulses. The signal may be provided in superposition with line power or the line power may be formed as the signal.

A glass jacketed led lamp is characterized by a prismatic LED module positioned coaxial to the axis of a cylindrical glass jacket having an inside diameter Dl, wherein the LED module comprises: a prismatic LED carrier structure having N longitudinal sides, and LEDs that are operationally mounted on at least one of the N sides; wherein: the carrier structure was formed by folding a single metal core printed circuit board (MCPCB) into a convex prismatic polyhedron; the prism cross section is an irregular and incomplete polygon such that the N sides are bounded by N+1 longitudinal fold edges, wherein a first edge and the (N+1)th edge are back edges that are spaced apart by a first separation GAP1.

A glass jacketed led lamp is characterized by a prismatic LED module positioned coaxial to the axis of a cylindrical glass jacket having an inside diameter Dl, wherein the LED module comprises: a prismatic LED carrier structure having N longitudinal sides, and LEDs that are operationally mounted on at least one of the N sides; wherein: the carrier structure was formed by folding a single metal core printed circuit board (MCPCB) into a convex prismatic polyhedron; the prism cross section is an irregular and incomplete polygon such that the N sides are bounded by N+1 longitudinal fold edges, wherein a first edge and the (N+1)th edge are back edges that are spaced apart by a first separation GAP1.

An LED tube lamp is disclosed. An installation detection circuit is configured in the LED tube lamp configured to receive an external driving signal. The installation detection circuit is configured to detect during one or more pulse signals whether the LED tube lamp is properly installed on a lamp socket, based on detecting a signal generated from the external driving signal. The installation detection circuit includes a switch circuit coupled to the pulse generating circuit, wherein the one or more pulse signals control turning on and off of the switch circuit. The installation detection circuit is further configured to: when it is detected during one or more pulse signals that the LED tube lamp is not properly installed on the lamp socket, control the switch circuit to remain in an off state to cause a power loop of the LED tube lamp to be open; and when it is detected during one or more pulse signals that the LED tube lamp is properly installed on the lamp socket, control the switch circuit to remain in a conducting state to cause the power loop of the LED tube lamp to maintain a conducting state.

An LED tube lamp is disclosed. An installation detection circuit is configured in the LED tube lamp configured to receive an external driving signal. The installation detection circuit is configured to detect during one or more pulse signals whether the LED tube lamp is properly installed on a lamp socket, based on detecting a signal generated from the external driving signal. The installation detection circuit includes a switch circuit coupled to the pulse generating circuit, wherein the one or more pulse signals control turning on and off of the switch circuit. The installation detection circuit is further configured to: when it is detected during one or more pulse signals that the LED tube lamp is not properly installed on the lamp socket, control the switch circuit to remain in an off state to cause a power loop of the LED tube lamp to be open; and when it is detected during one or more pulse signals that the LED tube lamp is properly installed on the lamp socket, control the switch circuit to remain in a conducting state to cause the power loop of the LED tube lamp to maintain a conducting state.

The present invention provides a straight tube type light emitting diode lamp with which high heat dissipation performance and high illuminance can be obtained. A cover (23) has a translucent cover (31) through which light emitted from an LED element (13) passes, and a first heat sink (33) coupled to a heat sink (15). A second heat sink (17) receives heat via a substrate (12), said heat having been generated from the LED element (13), and transmits the heat to a third heat sink (19). The third heat sink (19) extends toward the translucent cover (31) from one end, which serves as a coupling section coupled with the second heat sink (17), and the other end is coupled to the first heat sink (33). The LED element (13) is positioned on a center line (61) of the translucent cover (31) formed along a cross-section thereof.