Abstract: Shades and/or reflectors for luminaires. The luminaires may be retrofitted with the shades and/or reflectors to selectively control the direction and/or spectrum of light emitted by the luminaires. In particular, the efficiency and/or color contrast of a luminaire may be improved by using wavelength shifting material, such as a phosphor, to absorb less desired wavelengths and transmit more desired wavelengths. The shade may provide a transmissive filter which reflects desired wavelengths such as red and green, while passing less desired wavelengths (e.g., blue) toward the wavelength shifting material which emits such as light of more desirable wavelengths.

Abstract: Shades and/or reflectors for luminaires. The luminaires may be retrofitted with the shades and/or reflectors to selectively control the direction and/or spectrum of light emitted by the luminaires. In particular, the efficiency and/or color contrast of a luminaire may be improved by using wavelength shifting material, such as a phosphor, to absorb less desired wavelengths and transmit more desired wavelengths. The shade may provide a transmissive filter which reflects desired wavelengths such as red and green, while passing less desired wavelengths (e.g., blue) toward the wavelength shifting material which emits such as light of more desirable wavelengths.

Abstract: The efficiency and color contrast of a lighting device may be improved by using wavelength shifting material, such as a phosphor, to absorb less desired wavelengths and transmit more desired wavelengths. A double-notch reflective filter may pass desired wavelengths such as red and green, while returning or reflecting less desired wavelengths (blue and yellow) away from an optical exit back toward wavelength shifting material and re-emitted as light of more desirable wavelengths.

Abstract: An illumination device comprises a circuit board that carries solid-state light sources and a heat transfer structure to which the circuit board is intimately physically coupled such that the circuit board is curved along at least one of a longitudinal dimension or a lateral dimension thereof. Such may allow less fasteners to be used than would otherwise be possible, while maintaining close contact over a large portion of the surface area. Some embodiments may employ a clamp, for example a peripheral clamp such as a cover or bezel clamp.

Abstract: A solid-state lighting device for use in lieu of a gas discharge lamp, includes a housing; a lens coupled to the housing; a circuit board; and a plurality of solid-state light emitters carried by the circuit board and arranged to generate light to pass through the lens. An entirety of a form factor of the solid-state lighting device may be located within a cylindrical envelope having a length less than or about equal to an overall length of the gas discharge lamp and a diameter less than or about equal to the overall diameter of the gas discharge lamp. In addition, a light center length of the solid-state lighting device may be about equal to the light center length of the gas discharge lamp. Solid-state light emitters are arrayed with principal axes of emission radially spaced at least partially around and extending from a central axis of the lens.

Abstract: An illumination device comprises a solid-state lighting device and a heat sink. The heat sink is configured to be attachable to a fixture for a gas-discharge lamp to retrofit existing gas-discharge fixtures. The heat sink is conductively thermally coupled to the solid-state lighting device to dissipate heat generated by the solid-state lighting device.

Abstract: An illumination device comprising a housing fixture, a light source, and an active heat transfer device is provided. The housing fixture includes a base adapted to be receivable in a light fixture receptacle configured to receive a gas-discharge lamp. The light source emits light with a color rendering index higher than a respective color rendering index of at least a type of gas-discharge lamp. The active heat transfer device is physically coupled to the light source and mounted to the housing fixture. The active heat transfer device receives power from a power supply to remove thermal energy from the light source.

Abstract: The efficiency and color contrast of a lighting device may be improved by using wavelength shifting material, such as a phosphor, to absorb less desired wavelengths and transmit more desired wavelengths. A double-notch reflective filter may pass desired wavelengths such as red and green, while returning or reflecting less desired wavelengths (blue and yellow) away from an optical exit back toward wavelength shifting material and re-emitted as light of more desirable wavelengths.

Abstract: The efficiency and color temperature of a lighting device may be improved by using wavelength shifting material, such as a phosphor, to absorb less desired wavelengths and transmit more desired wavelengths. A reflective filter (e.g., dichroic or dielectric mirror material) may pass desired wavelengths while returning or reflecting less desired wavelengths away from an optical exit back toward wavelength shifting material which may either be disposed in the optical path or on the periphery of the light source.

Abstract: An apparatus for heat dissipation for a luminaire comprises an active heat transfer device and a thermally-conductive housing. The active heat transfer device causes turbulence in an ambient fluid. The thermally-conductive housing includes a cavity and a first end. The cavity is structured for an electronic ballast of the luminaire to be housed therein and thermally attached to an interior surface of the housing to allow the housing to absorb at least a portion of heat generated by the electronic ballast. The first end is structured for the active heat transfer device to be mountable to the first end of the housing. The housing further includes at least one thermally-conductive protrusion extending from an exterior surface of the housing and exposed to the turbulence in the ambient fluid to transfer at least a portion of the heat absorbed by the housing to the ambient fluid.

Abstract: A luminaire to illuminate surfaces comprises a housing, a mounting fixture and a light source. The housing includes a base having a bottom surface positionable on a surface to be illuminated, an interior, and at least one window providing access between the interior and an exterior of the housing. The mounting fixture extends at least approximately perpendicularly downward with respect to the bottom surface of the base to secure the housing into a peripheral portion of the surface to be illuminated. The light source has a principal axis of emission that is directed outwardly through the window of the housing at a downwardly oriented angle with respect to the bottom surface of the base such that, when in use with the luminaire mounted to the surface to be illuminated, the principal axis of emission of the light source is directed at a portion of the surface to be illuminated.

Abstract: An illumination device comprises a circuit board that carries solid-state light sources and a heat transfer structure to which the circuit board is intimately physically coupled such that the circuit board is curved along at least one of a longitudinal dimension or a lateral dimension thereof. Such may allow less fasteners to be used than would otherwise be possible, while maintaining close contact over a large portion of the surface area. Some embodiments may employ a clamp, for example a peripheral clamp such as a cover or bezel clamp.

Abstract: The efficiency and color temperature of a lighting device may be improved by using wavelength shifting material, such as a phosphor, to absorb less desired wavelengths and transmit more desired wavelengths. A reflective filter (e.g., dichroic or dielectric mirror material) may pass desired wavelengths while returning or reflecting less desired wavelengths away from an optical exit back toward wavelength shifting material which may either be disposed in the optical path or on the periphery of the light source.

Abstract: An illumination device comprises a solid-state light source and a heat transfer structure. The solid-state light source is thermally conductively coupled to the heat transfer structure to dissipate heat thereby. The heat transfer structure includes a first thermally conductive element and a second thermally conductive element. The first thermally conductive element is configured to transfer at least a portion of the heat from the light source to an external ambient environment. The second thermally conductive element is electrically non-conductive and electrically isolates the first thermally conductive element from the light source.

Abstract: An illumination device comprises a solid-state lighting device and a heat sink. The heat sink is configured to be attachable to a fixture for a gas-discharge lamp to retrofit existing gas-discharge fixtures. The heat sink is conductively thermally coupled to the solid-state lighting device to dissipate heat generated by the solid-state lighting device.

Abstract: An apparatus for heat dissipation for a luminaire comprises an active heat transfer device and a thermally-conductive housing. The active heat transfer device causes turbulence in an ambient fluid. The thermally-conductive housing includes a cavity and a first end. The cavity is structured for an electronic ballast of the luminaire to be housed therein and thermally attached to an interior surface of the housing to allow the housing to absorb at least a portion of heat generated by the electronic ballast. The first end is structured for the active heat transfer device to be mountable to the first end of the housing. The housing further includes at least one thermally-conductive protrusion extending from an exterior surface of the housing and exposed to the turbulence in the ambient fluid to transfer at least a portion of the heat absorbed by the housing to the ambient fluid.

Abstract: An illumination device comprising a housing fixture, a light source, and an active heat transfer device is provided. The housing fixture includes a base adapted to be receivable in a light fixture receptacle configured to receive a gas-discharge lamp. The light source emits light with a color rendering index higher than a respective color rendering index of at least a type of gas-discharge lamp. The active heat transfer device is physically coupled to the light source and mounted to the housing fixture. The active heat transfer device receives power from a power supply to remove thermal energy from the light source.

Abstract: A luminaire to illuminate surfaces comprises a housing, a mounting fixture and a light source. The housing includes a base having a bottom surface positionable on a surface to be illuminated, an interior, and at least one window providing access between the interior and an exterior of the housing. The mounting fixture extends at least approximately perpendicularly downward with respect to the bottom surface of the base to secure the housing into a peripheral portion of the surface to be illuminated. The light source has a principal axis of emission that is directed outwardly through the window of the housing at a downwardly oriented angle with respect to the bottom surface of the base such that, when in use with the luminaire mounted to the surface to be illuminated, the principal axis of emission of the light source is directed at a portion of the surface to be illuminated.