Abstract: Apparatus and methods of attaching accessories to LED lamps and for providing active accessories in LED lamps are disclosed. The active accessories include single-function active accessories as well as multi-function active accessories.

Abstract: A lighting device, comprising a housing, a light emitting diode, an optical system configured to at least partially collimate light emissions in a forward direction; and a removable accessory that reflects a portion of the light emissions more than 90 degrees from the forward direction. Also, a lighting device comprising a housing and a plurality of light emitters arranged in a row, and a light distribution-modifying element comprising a body portion and a plurality of light distribution-modifying protrusions (each comprising a reflection surface) arranged in a row substantially parallel to the row of light emitters, at least some of the light emitters aligned with at least some of the plurality of light distribution-modifying protrusions as respective pairs. Also, a light distribution-modifying element, and a lighting device comprising a housing, at least one light emitter, and a light distribution-modifying element comprising a body portion and a light distribution-modifying protrusion. Also, methods.

Abstract: A method includes determining a first amount of equivalent melanopic lux (EML) based on an actual time of day or an intended time of day, providing, via one or more sources, light configured to emit a first set of spectra that causes the first amount of EML and providing a light guide configured to receive and reflect the light toward an electronic paper (e-paper) display, the light guide being in front of the e-paper display in relation to the reader.

Abstract: Methods and apparatus for providing circadian-friendly LED light sources are disclosed. A light source is formed to include a first LED emission (e.g., one or more LEDs emitting a first spectrum) and a second LED emission (e.g., one or more LEDs emitting a second spectrum) wherein the first and second LED emissions are combined in a first ratio and in a second ratio such that while changing from the first ratio to the second ratio the relative circadian stimulation is varied while maintaining a color rendering index above 80.

Abstract: A display for emitting display light comprising: (a) a light source for emitting a source light; and (b) a filter positioned in the path of said source light, said filter comprising at least short, medium and long filters, wherein said short filter is configured to transmit short-primary light from said source light, said short-primary light comprising a violet portion having wavelengths from 400 to 440 nm and at least a second portion having wavelengths above 440 nm such that said short-primary light is perceptually blue, said short-primary light having a short-primary SPD having a short-primary power between 380-780 nm and a blue power between 440-500 nm, wherein said blue power is less than 5% of said short-primary power.

Abstract: In one embodiment, a method comprising: (a) receiving a set of physiological data associated with at least one health condition of an animal subject; (b) receiving a set of environmental data associated with one or more environment conditions to which the subject is or has been exposed; (c) determining a set of operating parameters for at least one environmental device based at least partially on at least a portion of the set of physiological data and at least a portion of the set of environmental data; and (d) transmitting the set of operating parameters to the at least one environmental device to at least partially control at least one controlled environmental condition to which the subject is exposed to thereby at partially control the at least one health condition.

Abstract: Methods and apparatus for providing circadian-friendly LED light sources are disclosed. A light source is formed to include a first LED emission (e.g., one or more LEDs emitting a first spectrum) and a second LED emission (e.g., one or more LEDs emitting a second spectrum) wherein the first and second LED emissions are combined in a first ratio and in a second ratio such that while changing from the first ratio to the second ratio the relative circadian stimulation is varied while maintaining a color rendering index above 80.

Abstract: A system for generating white light comprising a plurality of channels to generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each channel being driven with a separately controllable drive current to tune the generated light output.

Abstract: Lighting system having visible-light source including semiconductor light-emitting devices arranged for generating plurality of visible-light emissions having range of color points including cool to very cool white color point for daytime and warm to very warm white color point for nighttime. Optical system arranged for causing some visible-light emissions to have range of beam widths including relatively wide and narrow beam widths. Mounting system causing range of beam directions. Control system causing visible-light emissions to include daytime configuration having cool to very cool white color point and relatively wide beam width, and nighttime configuration having warm to very warm white color point and relatively narrow beam width. Daytime configuration includes control system for causing visible-light emissions to include lateral- or up-light emissions, promoting relatively high equivalent melanopic lux.

Abstract: Linear lighting system including tray extended along elongation directions and having base forming bottom interior surface of tray; first sidewall extending upward from base towards emission aperture of linear lighting system and second sidewall spaced apart across base from first sidewall and extending upward from base towards emission aperture. System further includes circuit board located on first sidewall in tray, plurality of LEDs located on circuit board and mutually spaced apart on first sidewall along elongation directions of tray and positioned for light emissions in directions facing toward second sidewall; and protuberance on base and interposed between LEDs and second sidewall, protuberance positioned for diverting light emissions from plurality of LEDs toward emission aperture. System having tray with first sidewall including angled reflective face and second sidewall including further angled reflective face, the faces positioned for reflecting light emissions toward the emission aperture.

Abstract: An optical device includes a light source with at least two radiation sources, and at least two layers of wavelength-modifying materials excited by the radiation sources that emit radiation in at least two predetermined wavelengths. Embodiments include a first plurality of n radiation sources configured to emit radiation at a first wavelength. The first plurality of radiation sources are in proximity to a second plurality of m of radiation sources configured to emit radiation at a second wavelength, the second wavelength being shorter than the first wavelength. The ratio between m and n is predetermined. The disclosed optical device also comprises at least two wavelength converting layers such that a first wavelength converting layer is configured to absorb a portion of radiation emitted by the second radiation sources, and a second wavelength converting layer configured to absorb a portion of radiation emitted by the second radiation sources.

Abstract: A lamp comprising: (a) a work light source configured to emit work light downward to illuminate a work surface; (b) a circadian stimulation (CS) light source having a light emitting surface for emitting CS light in at least a first mode normal to said work light, CS light in said first mode having a first EML and a first brightness sufficient to cause circadian entrainment in a user.

Abstract: A method includes sensing data indicative of a plurality of wavelengths of light utilizing one or more sensors forming a part of a sensor ring, storing the data on a memory device forming a part of the sensor ring, transmitting the data to a computing device external to the ring and receiving a photic environmental model from the computing device the photic environmental model based, at least in part, on the data.

Abstract: Lighting systems, methods, and devices for protecting human circadian neuroendocrine function during night use are described. Suitable lighting conditions can be provided for a working environment while protecting the circadian neuroendocrine systems of those occupying the illuminated workplace during the night. Lighting systems, methods, and devices can provide substantive attenuation of the pathologic circadian disruption in night workers. Lighting systems, methods, and devices can attenuate the specific bands of light implicated in circadian disruption. LED lighting systems, methods, and devices can provide increased intensity at a different portion of the spectrum than conventional LEDs, providing a useable white light even when unfavorable portions of the wavelength are attenuated by a notch filter.

Abstract: An artificial sunlight system for wall installation comprising: one or more modules, each module comprising at least the following, (a) a frame configured to be installed on a wall; (b) at least one panel supported by said frame, said panel having first and second ends and an emission surface for emitting panel light, and said panel being configured to emit said panel light away from said wall when said frame is installed on said wall; and (c) at least one ceiling light emitter supported by said frame, said ceiling light emitter being configured to emit ceiling light upward toward a ceiling when said frame is installed on said wall.

Abstract: A light source for emitting emitted light to reduce microbial load, said light source, comprising: (a) at least one first light source for emitting first light having a peak wavelength less than 400 nm; and (b) at least one second light source for emitting a second light; wherein said emitted light comprises a combination of said first light and said second light, wherein said emitted light has a spectral power distribution (SPD), wherein said SPD has a first power in said SPD between 350 nm and 800 nm, and a second power in said SPD between 350 nm and 420, wherein said second power is at least 40% of said first power, and wherein said emitted light has a CRI of at least 80.