Abstract: A white light LED-based lighting device may comprise a light assembly including a plurality of white-light LEDs disposed on a substrate. The LEDs may cover the substrate top surface in a density of greater than 50 individual LEDs per square inch. An electrical driver board is electrically connected to the LEDs. A heat sink is thermally connected to the substrate and the LEDs. A reflector assembly may be disposed on the heat sink such that its focal plane is disposed generally adjacent to the LEDs. The device may have a continuous operating temperature of 65 degrees Celsius or lower in a room temperature environment. The LEDs may comprise a top surface area of less than 2 mm2 and be arranged in a series of concentric rings on the substrate with each LED oriented along the circumference thereof. The reflector assembly may be filled at least partially with an impact-resistant polymer material.

Abstract: A white light LED-based lighting device may comprise a light assembly including a plurality of white-light LEDs disposed on a substrate. The LEDs may cover the substrate top surface in a density of greater than 50 individual LEDs per square inch. An electrical driver board is electrically connected to the LEDs. A heat sink is thermally connected to the substrate and the LEDs. A reflector assembly may be disposed on the heat sink such that its focal plane is disposed generally adjacent to the LEDs. The device may have a continuous operating temperature of 65 degrees Celsius or lower in a room temperature environment. The LEDs may comprise a top surface area of less than 2 mm2 and be arranged in a series of concentric rings on the substrate with each LED oriented along the circumference thereof. The reflector assembly may be filled at least partially with an impact-resistant polymer material.

Abstract: A white light LED-based lighting device configured for direct replacement of existing incandescent lighting devices is provided. The white light LED-based lighting device comprises a group of solid state light emitting diodes, electronics to activate the light emitting diodes, said solid state light emitters mounted on a planar surface, reflective optics located at the output of the lighting device, the planar surface with solid state light emitters located at the entrance to said reflective optics, and an encapsulating housing configured for direct replacement of existing incandescent lighting devices.

Abstract: The present invention is directed generally to lighting devices, and more particularly to white light LED-based lighting devices configured as a replacement to linear fluorescent tube devices. In a preferred embodiment of the present invention, the substrate may consist of multiple twelve-inch sections each with individual LEDs. In this configuration, 4 such twelve-inch sections may be aligned collinearly to form a 4 foot white light LED device similar to T5, T8, or T12 fluorescent light tubes.