Abstract: A lamp comprises a LED lamp comprising a base. A plurality of LEDs are attached to a first side of the base. A lens covers the plurality of LEDs. A power supply provides power to the LEDs. A first electrical connector provides power to the power supply. A troffer housing comprises a wire way for receiving the power supply. A second electrical conductor is adapted to be connected to a source of power. The base is secured to the troffer housing where the power supply is located in the wire way and the first electrical conductor is connected to the second electrical conductor.

Abstract: A lamp comprises a LED lamp comprising a base. A plurality of LEDs are attached to a first side of the base. A lens covers the plurality of LEDs. A power supply provides power to the LEDs. A first electrical connector provides power to the power supply. A troffer housing comprises a wire way for receiving the power supply. A second electrical conductor is adapted to be connected to a source of power. The base is secured to the troffer housing where the power supply is located in the wire way and the first electrical conductor is connected to the second electrical conductor.

Abstract: A lamp comprises a LED lamp comprising a base. A plurality of LEDs are attached to a first side of the base. A lens covers the plurality of LEDs. A power supply provides power to the LEDs. A first electrical connector provides power to the power supply. A troffer housing comprises a wire way for receiving the power supply. A second electrical conductor is adapted to be connected to a source of power. The base is secured to the troffer housing where the power supply is located in the wire way and the first electrical conductor is connected to the second electrical conductor.

Abstract: Light emitting devices include a first string of LEDs that emit light having a color point that is within at least eight MacAdam ellipses of a first blue-shifted-yellow region on the 1931 CIE Chromaticity Diagram, a second string of LEDs that emit light having color point that is within at least eight MacAdam ellipses of a second blue-shifted-green region on the 1931 CIE Chromaticity Diagram, and a third light source that emits radiation having a dominant wavelength between 600 and 720 nm. A drive circuit supplies respective drive currents to the first string of LEDs, the second string of LEDs and the third light source, at least two of which are independently controllable.

Abstract: A lamp comprises a LED lamp comprising a base. A plurality of LEDs are attached to a first side of the base. A lens covers the plurality of LEDs. A power supply provides power to the LEDs. A first electrical connector provides power to the power supply. A troffer housing comprises a wire way for receiving the power supply. A second electrical conductor is adapted to be connected to a source of power. The base is secured to the troffer housing where the power supply is located in the wire way and the first electrical conductor is connected to the second electrical conductor.

Abstract: Light emitting devices include a first string of LEDs that emit light having a color point that is within at least eight MacAdam ellipses of a first blue-shifted-yellow region on the 1931 CIE Chromaticity Diagram, a second string of LEDs that emit light having color point that is within at least eight MacAdam ellipses of a second blue-shifted-green region on the 1931 CIE Chromaticity Diagram, and a third light source that emits radiation having a dominant wavelength between 600 and 720 nm. A drive circuit supplies respective drive currents to the first string of LEDs, the second string of LEDs and the third light source, at least two of which are independently controllable.