Abstract: An LED-based light can be installed in a conventional light fixture. The LED-based light can include a sensor operable to output a first signal indicative of whether an area of one or more of the rooms is in an occupied state or a non-occupied state, and the LED-based light can also include an LED controller operable to control at least one LED in the light in response to the first signal. Additionally, the LED-based light can include a transmitter operable to output a second signal indicative of whether the area is in the occupied state or the non-occupied state to a building environment regulator.

Abstract: An emergency lighting system for a building includes at least one LED-based light. An emergency detector is operable to detect an emergency. The emergency detector produces an emergency signal in response to the emergency. A controller is operable to control the at least one LED-based light in response to the emergency signal.

Abstract: A light modifier for an LED producing light about a central axis can reduce the appearance of a bright spot created by the LED. The light modifier comprises a lens defining an indentation at its outer surface, with the indentation having an angled side wall and an outer edge joining the side wall to the outer surface. The side wall is spaced from the LED and angled relative to the central axis such that light produced by the LED and striking the side wall is at least substantially internally reflected to pass through a light transmitting portion of the outer surface directly bordering the outer edge, forming a line of light around the indentation.

Abstract: Disclosed herein is an illumination device having at least one LED and a power converter with a switching element for connection to an existing fluorescent lamp fixture including a conventional ballast. The illumination device includes a feedback circuit operable to provide a switching signal to the switching element according to a duty cycle, the feedback circuit configured to: increase the value of the duty cycle to decrease an output current signal through the at least one LED; and decrease the value of the duty cycle to increase the output current signal through the at least one LED.

Abstract: An LED based light for replacing an incandescent bulb comprises a base having a first end and a second end. A connector is fixed to the first end of the base and adapted to physically connect to an incandescent light fixture. A light structure extends from the second end of the base and has an inner surface defining a cavity and an opposing exterior outer surface, and at least one LED is arranged outward from the inner surface. A heat dissipating structure for the at least one LED extends into the cavity.

Abstract: A current limiting circuit for use with an electrical device may include a test load and a test load switch operable for varying an electrical current flowing through the test load. A detector may be electrically connected to the test load for detecting variations in an electrical characteristic of the test load and generating a detector output signal indicative of the electrical characteristic. A detection threshold signal source may be provided for producing a detection threshold signal. A comparator may be electrically connected to the detector and the threshold signal source, the comparator operable for generating a load switch control signal based at least in part on the detector output signal and the detection threshold signal. A load switch may be electrically connected to the comparator and operable for adjusting a current flow through a main load in response to the load switch control signal.

Abstract: A lighting and communication system for use in a standardized light fixture is provided. The lighting and communication system includes a light source and a communication apparatus. At least one electrical connector configured for physical and electrical connection to the standardized light fixture is included, and the at least one electrical connector is electrically connected to the light source and the communication apparatus.

Abstract: Disclosed herein is an LED-based light for replacing a fluorescent bulb in a conventional fluorescent light fixture. The LED-based light includes a housing having a first end opposing a second end, a circuit board disposed within the housing and extending along a longitudinal axis of the housing, at least one LED mounted to the circuit board, at least one end cap disposed on one of the first and second ends of the housing, the end cap including a switch and at least one electrically conductive pin configured for physical and electrical connection to the light fixture; and circuitry configured to provide a current path between the at least one LED and the at least one electrically conductive pin, wherein the switch is configured to selectively disconnect the current path.

Abstract: Disclosed herein are embodiments of LED-based lights for replacing a conventional fluorescent light bulb in a fluorescent light fixture and embodiments of a circuit board mount for an LED-based light tube having an elongate housing with at least one circuit board spanning the housing. One embodiment disclosed herein of a circuit board mount comprises an end cap configured to fit over an open end of the housing. The end cap comprises an end wall, at least one pin connector extending through the end wall and at least one fitted slot extending from the end wall configured to receive an end of the circuit board, the at least one fitted slot having an elastic member within the at least one fitted slot configured to cushion the circuit board.

Abstract: Disclosed herein is a method of forming a LED-based light for replacing a conventional fluorescent bulb in a fluorescent light fixture including providing a heat sink of highly thermally conductive material having opposing longitudinally extending edges, mounting a plurality of LEDs in thermally conductive relation with the heat sink and enclosing the plurality of LEDs within a light transmitting cover such that the longitudinally extending edges engage an interior of the cover to support the heat sink within the light transmitting cover.

Abstract: An LED-based light can be installed in a conventional light fixture. The LED-based light can include a sensor operable to output a first signal indicative of whether an area of one or more of the rooms is in an occupied state or a non-occupied state, and the LED-based light can also include an LED controller operable to control at least one LED in the light in response to the first signal. Additionally, the LED-based light can include a transmitter operable to output a second signal indicative of whether the area is in the occupied state or the non-occupied state to a building environment regulator.

Abstract: A light modifier for an LED producing light about a central axis is provided. The light modifier includes a lens defining an indentation. The indentation is angled relative to the central axis by an amount less than a complementary angle of a critical angle of the lens along the indentation. The lens can reduce the appearance of a bright spot created by the LED.

Abstract: An LED based light and a method of providing power to the LED are disclosed. The LED based light includes at least one LED and at least one thermoelectric generator having a first side and a second side. The first side is thermally coupled to the at least one LED such that heat generated by the at least one LED is conducted to the at least one thermoelectric generator, producing a temperature differential between the first side and second side. The at least one thermoelectric generator is configured to produce electrical energy from the temperature differential.

Abstract: An LED based light comprises a base, a light structure, a heat dissipating structure, and at least one LED. The light structure is adjacent to the base and extends along a longitudinal axis of the light. The light structure includes an inner surface and an outer surface and defines a cavity, and the heat dissipating structure extends into the cavity. At least one LED is mounted in thermally conductive relation to the heat dissipating structure. In one version, the light structure is an annular flange, and an organic LED is mounted to the outer surface. In another version, the light structure is a light pipe configured to distribute a light produced by the at least one LED in a predetermined light distribution.

Abstract: Disclosed herein is an illumination device having at least one LED and a power converter with a switching element for connection to an existing fluorescent lamp fixture including a conventional ballast. The illumination device includes a feedback circuit operable to provide a switching signal to the switching element according to a duty cycle, the feedback circuit configured to: increase the value of the duty cycle to decrease an output current signal through the at least one LED; and decrease the value of the duty cycle to increase the output current signal through the at least one LED.

Abstract: An LED-based light configured for replacing a conventional fluorescent light in a fluorescent light fixture comprises: an LED circuit board including at least one LED; a power supply circuit board configured to supply power to the at least one LED; an end cap carrying at least one pin configured for connection to the fixture; a pin connector header including a first body retentively supporting at least one pin connecting lead and configured to engage the power supply circuit board such that the pin connecting lead is positioned to electrically connect the power supply circuit board and the pin; and a circuit connector header including a second body retentively supporting at least one circuit connecting lead and configured to engage the power supply circuit board such that the circuit connecting lead is positioned to electrically connect the power supply circuit board and the LED circuit board.

Abstract: Disclosed herein is an LED-based light for replacing a fluorescent bulb in a conventional fluorescent light fixture. The LED-based light includes a housing having a first end opposing a second end, a circuit board disposed within the housing and extending along a longitudinal axis of the housing, at least one LED mounted to the circuit board, at least one end cap disposed on one of the first and second ends of the housing, the end cap including a switch and at least one electrically conductive pin configured for physical and electrical connection to the light fixture; and circuitry configured to provide a current path between the at least one LED and the at least one electrically conductive pin, wherein the switch is configured to selectively disconnect the current path.

Abstract: Disclosed herein are embodiments of a LED fluorescent tube replacement lamp and lighting modules from which the lamp is constructed. One embodiment of a replacement lamp includes a plurality of interchangeable lighting modules that are configured to be electrically connected to adjacent modules. The interchangeable lighting modules can include end modules each having an end cap with pin connectors, at least one of the end modules includes electrical circuitry connected to the pin connectors for powering the modules. The lighting modules can also be center unit modules having LEDs mounted to a circuit board. The replacement lamps can be made from conceivable configurations of the lighting modules, requiring removal of only one module for repair or replacement.