KORRUS, INC.

An LED pump light with multiple phosphors is described. LEDs emitting radiation at violet and/or ultraviolet wavelengths are used to pump phosphor materials that emit other colors. The LEDs operating in different wavelength ranges are arranged to reduce light re-absorption and improve light output efficiency.

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.

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.

Bioactive display systems for displaying digital content. The display systems have one or more LED-based lighting channels adapted to generate one or more of a long red near infrared (LRNE) red light, a circadian-inducing blue light output in first operational mode and a less-circadian-inducing blue light output in a second operational mode. The bioactive lighting can have a first circadian-stimulating energy characteristic related to the associated first spectral power distributions of light generated in the first operational mode, and the non-circadian-inducing blue light can have a second circadian-stimulating energy characteristic related to the associated second spectral power distribution of light generated in the second operational mode. Disclosure methods of generating digital display content with the display systems described herein. The methods can generate a circadian-inducing blue light output in first operational mode and one of a LRNE output and a less-circadian-inducing blue light output in a second operational mode.

The present disclosure provides systems for generating tunable white light. The systems include a plurality of LED strings that generate light with color points that fall within red, blue, and green color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.

The present disclosure provides methods for generating white light. The methods use a plurality of LED strings to generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.