A lighting device configured to deactivate pathogens in an environment. The lighting device includes at least one first light-emitting element configured to emit light having a wavelength of between 400 nm and 420 nm, wherein the light emitted by the at least one first light-emitting element is configured to deactivate the pathogens in the environment. The lighting device also includes at least one second light-emitting element configured to emit light having a wavelength of greater than 420 nm. A first combined light output of the light emitted by the at least one first and the at least one second light-emitting elements includes visible light that is perceived as white light. The white light has properties that make it visually appealing and unobjectionable.

A lighting apparatus includes a light passing cover, a rim structure and a pressing structure. The light passing cover has a peripheral edge, a central part and a reverse curve surface. The reverse curve surface is extended from the peripheral edge. The central part allowing a light source to emit a light to pass through. The rim structure has a socket, a peripheral wall, and a bottom edge. The pressing structure is made of an elastic strip bent to form a top portion, a middle portion and a root portion. The root portion is kept in the socket. The middle portion presses the reverse curve surface of the light passing cover with an elastic force of the elastic strip to keep the light passing cover staying between the middle portion and the bottom edge of the rim structure.

A lighting device is provided that has a light source arrangement with a plurality of semiconductor-based light sources in the form of light-emitting diodes. The light sources are bundled or collimated such that they each emit light in differently directed light cones with adjacent light cones overlapping. The lighting device has an adjusting device for adjustment of the direction of illumination and an actuating circuit connected to the adjusting device. The adjusting device adjusts intermediate stages for which the light-emitting diodes of adjacent and overlapping light cones operate and with varying light intensity in such a way the focal point of the light field produced by the light-emitting diodes lies between the focal points of adjacent light cones.

A lighting system that includes a lighting device and a dimming controller. The lighting device has a support structure that supports multiple lighting zones. Each lighting zone including one or more lighting sources. The dimming controller is in communication with multiple dimmers supported by the lighting device. Each of the lighting sources is coupled to a corresponding dimmer from the multiple dimmers. The dimming controller is configured to communicate a controlled setting for one or more of the lighting zones to the multiple dimmers.

A light emitting device includes a plurality of oblong flexible substrates, each flexible substrate comprising a sheet-shaped base body and a wiring pattern formed on one face of the base body, and each flexible substrate having a plurality of light emitting sections disposed thereon; a plurality of a reflective layers, each reflective layer being disposed at a periphery of a respective light emitting section above a respective flexible substrate; an insulating reflective sheet made of a light reflecting resin, the reflective sheet having a plurality of through holes located such that the light emitting sections and at least a portion of the reflective layers are exposed via the through holes; and a plurality of adhesive members, each adhesive member adhering a respective flexible substrate to the reflective sheet in regions where the reflective layer is not formed.

The present disclosure discloses an illumination device, including a first lamp body; a driving power supply component received in the first lamp body; a connecting element assembled into the first lamp body; a second lamp body connected to the connecting element and rotatable with respect to the first lamp body; a light source component received in the second lamp body; a second light distribution element received in the second lamp body and configured to perform a secondary light distribution to a part of light emitted from the light source component; and a first light distribution element disposed on the first lamp body and configured to perform a secondary light distribution to a second part of the light emitted from the light source component.

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. LED lighting systems, methods, and devices can switch between a daytime configuration and a night time configuration, wherein the daytime configuration provides unfiltered light and the night time configuration provides filtered light.

The present invention relates to an illumination device, including: a support member; and at least one first light source on the support member and at least one second light source on the support member, where the first light source has a first light distribution, the second light source has a second light distribution, and the first light distribution is different from the second light distribution.

A lighting device having a first configuration wherein a first light source is exposed and a second light source is covered and a second configuration wherein the first light source is exposed and the second light source is exposed. The light device is enclosed in a rigid enclosure securing the lighting device in the second configuration. A power source is electrically coupled to the lighting device to provide power to the first light source and the second light source. A switch is coupled to the power source and the first and second light sources. The switch is configured to permit propagation of power from the power source to the second light source when the lighting device is in the second configuration.

An airfield light, components thereof, and associated methods. The airfield light can include a baffle including a baffle body and one or more baffle members secured to the baffle body. The baffle members are configured to cover portions of a baffle window. At least one light source is mounted in association with the baffle and emits light out of the baffle window. The baffle members cover portions of the baffle window for blocking light transmission therethrough. A method of assembling an airfield light includes arranging a baffle to shroud a light assembly and removing a baffle member to permit light from the light assembly to emit through a portion of a baffle window opened by removing the baffle member. A baffle for an airfield light is also disclosed.