A white light emitting device with an efficiency of at least 230 lm/W at a blue LED chip input current density from 10 to 60 mA/mm.sup.2, preferably in the range from 15 to 40 mA/mm.sup.2 and more preferably in the range from 20 to 30 mA/mm.sup.2. The device comprises a substrate, at least one string of blue LED chips mounted on the substrate and a phosphor material composition. Said phosphor material composition comprises a narrow band red phosphor which generates light with a peak emission wavelength in a range from 625 nm to 635 nm. The weight percentages of the narrow band red phosphor are between 33 to 49 wt. % for a CCT of from 4000 to 6500K or in an amount of from 60 to 70 wt. % for a CCT of from 2700 to 3500K CCT.

A method of inactivating one or more pathogens in an environment. The method includes providing light from at least one lighting element of a lighting device installed in the environment, the at least one lighting element configured to provide light toward a target area in the environment, the provided light having at least a pathogen-inactivating first component in a first range of wavelengths of 400 nanometers to 420 nanometers. The pathogen-inactivating first component of light produces an irradiance of at least 0.01 mW/cm.sup.2 as measured at a surface in the target area that is unshielded from the lighting device and located at a distance of 1.5 meters from an external-most luminous surface of the lighting device. Providing the light causes the one or more pathogens to be inactivated.

A luminaire includes a first light source and a second light source, the first and second light source operatively configured to provide amounts of light independently controllable during operation; and an optical system having an input aperture system and an output aperture system. The output aperture system is displaced by a predetermined distance along a forward direction from the input aperture system. The optical system is operatively coupled with the first and second light source and configured to direct light received at the input aperture system to the output aperture system. The output aperture system is configured to output light from the first light source in first directions and light from the second light source in second directions at least in part different from the first directions.

Apparatus and methods for lighting. The apparatus may include a lighting assembly. The lighting assembly may include a light emitting diode (LED) light source. The lighting assembly may include a support. The support may define a hole. The lighting assembly may include a translucent body. The translucent body may include a first extension that is configured to extend through the hole. The translucent body may define a protrusion. The first extension may extend from the protrusion. A second extension may extend from an opposite side of the protrusion. The protrusion may obstruct passage of the translucent body through the hole. The lighting assembly may include a frame. The frame may be spaced apart from the support. The frame may define a passage configured to receive the first extension. The first and second extensions may be parallel to each other.

A light emitting diode (LED) lighting arrangement for a lighting fixture includes: a lighting strip comprising a plurality of light emitting diodes (LEDs) arranged along a length of the lighting strip; a first multi-faceted side wall reflector extending from a first side of the lighting strip at an angle such that the first multi-faceted side wall reflector extends along an entire length of the lighting strip and away from a bottom portion of a light emitting portion of each of the light emitting diodes (LEDs); and a second multi-faceted side wall reflector extending from a second, opposite side of the lighting strip at an angle such that the second multi-faceted side wall reflector extends along an entire length of the lighting strip away from the bottom portion of the light emitting portion of each of the light emitting diodes (LEDs).

An aircraft light comprises a light source support board, having a light source side and a back side; and a light source, arranged on the light source side of the light source support board; wherein the light source support board comprises a first metallic layer, the first metallic layer forming conductive traces on the light source side of the light source support board; an isolating layer; a second metallic layer, wherein the isolating layer is arranged between the first metallic layer and the second metallic layer and isolates the second metallic layer from the first metallic layer; and a support board core layer. A cavity is provided in the support board core layer.

A lighting system and luminaire replicates attributes of natural sunlight and the sky. An array of light emitters capable of emitting light closely mimicking natural sunlight. This emitted light features an adjustable correlated color temperature (CCT) that spans from 1900 K to 6500 K, faithfully reproducing the Sun's appearance across different times of the day. To ensure precision in spectral matching, the system operates within a defined wavelength range of 400 nm to 1400 nm. At least one light emitter with a wavelength within the range of 760 nm to 1400 nm is incorporated to guarantee accurate representation. A luminaire equipped with a panel interacts with the multitude of light emitters, proficiently emitting color-tunable light and simulating diverse sky scenes. To facilitate control and customization, a dedicated control system is seamlessly integrated into the luminaire, enabling precise adjustment of the correlated color temperature and spectral power distribution.

An inventory management system may comprise first and second storage locations each having a unique identifier; LED strip lights having at least one light spatially associated with the first storage location and one light spatially associated with the second storage location; a database for storing storage locations for one or more items; and a control system for receiving a request for a first item, determining based on a database query that the first item is stored in the first storage location, and illuminating the light associated with the first storage location.

An electronic device with light-indicating function is provided. The electronic device includes a substrate, a first light source, a second light source, and a light guiding element. The substrate includes a first surface and a second surface, wherein the first surface is opposite to the second surface. The first light source is disposed on the first surface of the substrate, wherein the first light source faces the first direction, and the first light source provides a first light beam. The second light source is disposed on the first surface of the substrate, wherein the second light source faces the second direction, the second light source provides a second light beam, and the first direction is not parallel to the second direction. The light guiding element includes a first section and a second section.

The present disclosure provides an optical packaging structure and a backlight module with the optical packaging structure. The optical packaging structure includes a light-emitting chip, a packaging layer, a fluorescent layer, a lens structure, and a reflecting layer. The light-emitting chip includes a light-emitting surface, a connecting surface, and a side surface. The packaging layer covers the light-emitting surface and the first side surface. The connecting surface is exposed from the packaging layer. The fluorescent layer is disposed on the packaging layer, and covers on the light-emitting surface and the first side surface. The lens structure is disposed on a top surface of the fluorescent layer. A surface of the lens structure is recessed towards the light-emitting chip to form a curved surface. The reflecting layer is disposed on the curved surface.