Abstract: A lighting fixture for use in a security detention facility. The lighting fixture includes a unitary housing adapted to be mounted to a surface in the security detention facility, a first bracket disposed within the unitary housing, and a light source coupled to the first bracket, the light source including a plurality of light-emitting diodes (LEDs). When the unitary housing is mounted to the surface in the security detention facility, the internal components of the lighting fixture (e.g., the light source) are not accessible, such that inmates of the security detention facility are unable to damage the internal components of the lighting fixture or access the internal components of the lighting fixture to hide weapons or contraband therein or use those components to harm themselves, other inmates, and/or security personnel.

Abstract: A lighting device configured to deactivate MRSA bacteria in air in an environment, including a housing; a light-emitting diode (LED) configured to emit light having a wavelength of about 470 nm; a light converting phosphor coating; wherein a first component of the light emitted by the LED travels through the light converting phosphor coating without alteration, and a second component of light emitted by the LED is converted by the converting phosphor coating into light having a wavelength of greater than 500 nm; wherein the first component of the light has a minimum integrated irradiance of 0.01 mW/cm2; wherein the first component of the light emitted by the LED and the second component of light emitted by the LED mix to form a combined light, with the combined light being visible light; and means for directing the combined visible light to the air in the environment.

Abstract: A luminaire that includes a plurality of light emitting diodes (LEDs), a light diffuser having a planar surface facing the LEDs, and a reflector that surrounds a cavity formed between the light diffuser and the LEDs. Also disclosed is a method of distributing light that involves emitting light towards a light diffuser having a planar surface having a reflective coating, scattering a first portion of the light with the light diffuser, reflecting a second portion of the light with the light diffuser, reflecting the second portion of the light with a first reflective surface back towards the light diffuser, and scattering the second portion of the light with the light diffuser. Further disclosed is another method of distributing light that involves emitting light toward a light diffuser and reflecting a portion of the emitted light toward the light diffuser via a reflector.

Abstract: A lighting device configured to deactivate dangerous pathogens (e.g., MRSA bacteria) in an environment. The lighting device includes at least one lighting element with a single light source configured to provide light. At least a first component of the light comprising light having a wavelength of about 405 nm, and at least a second component of the light comprising light having a wavelength of greater than 420 nm. The first component of light has a minimum integrated irradiance of 0.01 mW/cm2 measured from any unshielded point in the environment that is 1.5 m from any point on any external-most luminous surface of the lighting device.

Abstract: A luminaire with uplighting and downlighting capabilities is provided. According to one aspect, the luminaire may include a housing, a light source disposed in the housing, and a lens. The light source may be configured to emit light in a downward direction, and the lens may at least partially cover the light source. An opening may be formed in a top part of the housing and may permit light reflected by an interior surface of the lens to be transmitted in an upward direction from the housing. Optionally, a transparent or translucent cover member may at least partially cover the opening in the top part of the housing.

Abstract: A lighting device configured to deactivate pathogens in an environment. The lighting device includes a housing, means for mounting the housing to a surface in the environment, one or more first light-emitting elements arranged in the housing and configured to each produce disinfecting light having a wavelength in a first range of wavelengths, and one or more second light-emitting elements arranged in the housing and configured to each produce disinfecting light having a wavelength in a second range of wavelengths different from the first range of wavelengths. The disinfecting light produced by the first light-emitting elements and the disinfecting light produced by the second light-emitting elements mix to form a combined light, the combined light being visible light other than white light.

Abstract: A lighting system configured to provide light and disinfect air in an environment. The lighting system includes an HVAC unit configured to provide air to the environment, and a lighting device configured to deactivate microorganisms in the air. The lighting device includes a housing, means for mounting the housing to a surface in the environment, one or more first light-emitting elements arranged in the housing and configured to each produce disinfecting light having a wavelength in a first range of wavelengths, and one or more second light-emitting elements arranged in the housing and configured to each produce disinfecting light having a wavelength in a second range of wavelengths different from the first range of wavelengths. The disinfecting light produced by the first light-emitting elements and the disinfecting light produced by the second light-emitting elements mix to form a combined light, the combined light being visible light other than white light.

Abstract: A lens system for LED based light fixtures having a substantially coplanar array of LED's with a requirement for a wide angle of illumination. And in particular, light fixtures comprising LED lights used in low bay applications.

Abstract: A luminaire with a light pipe assembly and related methods of assembly are provided. According to one aspect, the luminaire may include a housing and lens covering an opening formed in the housing. A light source may be disposed in the housing and configured to emit artificial light in a forward direction toward the lens. The light pipe assembly may span at least a portion of a distance between the lens and the light source, and may be configured to transport ambient light rays present in an environment outside of the housing to a location within the housing isolated from the artificial light.

Abstract: A luminaire with various sensing capabilities is provided. According to one aspect, the luminaire may include a housing and a lens covering an opening formed in the housing. In addition, the luminaire may include a sensing assembly which is disposed in the housing and configured to detect changes in an environment outside the housing. A light source may also be disposed in the housing and configured to emit light in a forward direction toward the lens. The sensing assembly may be positioned rearward of at least a portion of the light source.

Abstract: A modular lighting fixture may include an elongate housing having ends and terminating in sidewall edges, an elongate lens having end edge portions and opposite elongate edges forming lens-sealing surfaces, each fitted to a corresponding one of the sidewall edges, a pair of end structures each removably attachable to either end of the housing, such end structures fitted to the lens; and a plurality of gasket seals including an elongate gasket between each elongate edge and its corresponding lens-sealing surface and a gasket between each end of the housing and its corresponding lens end edge portions.