Abstract: A lighting fixture with reduced glare is provided. Lighting fixtures described herein use a lens assembly to redirect light away from a housing in order to reduce a unified glaring ratio (UGR) (e.g., when viewed crosswise or endwise). The lens assembly may further provide diffusive properties which result in a more pleasing and soft light over traditional lighting fixtures. In aspects described herein, the UGR of troffer-style lighting fixtures can be improved (e.g., reduced) through lens assemblies having one or more light redirection features configured to particularly redirect light emitted at high v-angles (e.g., light emitted sideways relative to the housing at v-angles greater than 70 degrees). For example, the lens assembly may include an inner prismatic surface of a lens, an inner lens, a louver assembly (e.g., over or under a lens), or a reflector to achieve this light redirection.

Abstract: A lighting fixture with reduced glare is provided. Lighting fixtures described herein use a lens assembly to redirect light away from a housing in order to reduce a unified glaring ratio (UGR) (e.g., when viewed crosswise or endwise). The lens assembly may further provide diffusive properties which result in a more pleasing and soft light over traditional lighting fixtures. In aspects described herein, the UGR of troffer-style lighting fixtures can be improved (e.g., reduced) through lens assemblies having one or more light redirection features configured to particularly redirect light emitted at high v-angles (e.g., light emitted sideways relative to the housing at v-angles greater than 70 degrees). For example, the lens assembly may include an inner prismatic surface of a lens, an inner lens, a louver assembly (e.g., over or under a lens), or a reflector to achieve this light redirection.

Abstract: Lighting fixtures that include fixture housings and light-emitting diode (LED) modules configured for tool-less attachment and detachment to the fixture housings are disclosed. Certain LED modules include LED emitters, corresponding electronics for operating the LED emitters, and at least one shaped protrusion. Certain LED modules include safety tethers that are configured to provide mechanical support during the tool-less attachment and detachment. Lighting fixtures include a lens and removable endcaps that secure the lens to the fixture housing. Certain lighting fixtures include a backup battery and a button provided in one of the endcaps for testing the backup battery. Certain lighting fixtures include a cut-out portion in the fixture housing corresponding to the shaped protrusion of the LED module for providing identification of replacement LED modules that may be attached to fixture housings.

Abstract: Lighting fixtures that include fixture housings and light-emitting diode (LED) modules configured for tool-less attachment and detachment to the fixture housings are disclosed. Certain LED modules include LED emitters, corresponding electronics for operating the LED emitters, and at least one shaped protrusion. Certain LED modules include safety tethers that are configured to provide mechanical support during the tool-less attachment and detachment. Lighting fixtures include a lens and removable endcaps that secure the lens to the fixture housing. Certain lighting fixtures include a backup battery and a button provided in one of the endcaps for testing the backup battery. Certain lighting fixtures include a cut-out portion in the fixture housing corresponding to the shaped protrusion of the LED module for providing identification of replacement LED modules that may be attached to fixture housings.

Abstract: A lighting fixture includes a housing, a light source, an optics array, and control circuitry. The housing includes an opening through which light is provided from the lighting fixture towards an area of interest. The light source is in the housing and includes a number of solid-state light sources. The optics array is also in the housing and includes a number of optics. Each optic in the optics array is configured to focus light from each one of the light sources into a number of beams of light such that each one of the beams of light is provided through the opening of the housing at a different angle. The control circuitry is configured to selectively illuminate the number of solid-state lighting sources such that a direction of light provided by the lighting fixture dynamically changes over time.

Abstract: A luminaire with a prismatic optic permits the nearly uniform distribution of light about the luminaire. The prismatic optic permits the use of directional light sources, such as light emitting diodes, while maintaining the uniform light distribution. When light emitting diodes are used, the luminaire further includes a heat sink to maintain a desirable operational temperature without negatively affecting the light distribution properties of the luminaire.

Abstract: A luminaire comprising a base, an optic attached to the base, a heat sink integrally molded within the base, and a heat-generating element comprising a light source in thermal communication with the heat sink. The light source may be positioned such that light is emitted thereby into an optical chamber defined by the first housing. A second housing may comprise channels formed by opposing pairs of fin guards. The heat sink may comprise fin assemblies connected along a perimeter of a heat-generating element contacting portion of the heat sink. An enclosable region may be formed between fin guards that has a knurled portion on an outer surface thereof. A proximal edge of each fin assembly may be positioned adjacent to an outer surface of the first housing, and a distal edge thereof may be positioned coextensive with a respective channel and substantially exposed to the environment external to the luminaire.

Abstract: A luminaire provides light having a distribution pattern with high center beam candle power and a gradual gradient across a wide area. The luminaire includes a light source having first and second sets of light emitting elements selected and positioned to achieve the desired light distribution pattern. The luminaire further includes an optic configured to refract light emitted from the light source to achieve the desired light distribution pattern.

Abstract: A luminaire comprising a base, an optic attached to the base, a heat sink integrally molded within the base, and a heat-generating element comprising an LED-based light source in thermal communication with the heat sink. The light source may be positioned such that light emitted by the LED is emitted into an optical chamber defined by the first housing. A second housing may comprise channels formed by opposing pairs of fin guards. The heat sink may comprise a plurality of fin assemblies connected along a perimeter of a heat-generating element contacting portion of the heat sink. A proximal edge of each fin assembly may be positioned adjacent to an outer surface of the first housing. A distal edge of each fin assembly may be positioned so as to be coextensive with a respective channel and substantially exposed to the environment external to the luminaire.

Abstract: A luminaire comprising a base, a heat sink modularly connected to the base, and a heat-generating element in thermal communication with the modular heat sink. The heat sink may include a heat-generating element contacting portion, and a plurality of heat sink segments connected to and extending outwardly therefrom. Each of the heat sink assemblies segments may comprise at least one fin assembly. Each heat sink segment may pass through a respective plurality of passageways in the top portion of the base so that the heat sink segments may matingly engage the medial portion of the base. A method for forming a heat sink comprises fabricating a heat-generating element contacting portion, constructing a plurality of heat sink segments, and assembling the plurality of heat sink segments to connect to and extend outwardly from the bottom surface of the heat-generating element contacting portion.

Abstract: A luminaire to be carried by a lighting fixture. The luminaire may include a housing, a primary optic disposed within the housing having a reflective inner surface defining an optical chamber, a light source, and a heat sink defining an aperture through which light may propagate. The light source may include a plurality of light-emitting diodes (LEDs). The luminaire may further include a secondary optic positioned adjacent to the light source that may collimate and/or refract light emitted by the light source, and may form a seal between the light source and the optical chamber. The luminaire may further include a color conversion layer configured to change the color of light emitted by the light source.

Abstract: A luminaire comprising a base, a heat sink modularly connected to the base, and a heat-generating element in thermal communication with the modular heat sink. The heat sink may include a heat-generating element contacting portion, and a plurality of heat sink segments connected to and extending outwardly therefrom. Each of the heat sink assemblies segments may comprise at least one fin assembly. Each heat sink segment may pass through a respective plurality of passageways in the top portion of the base so that the heat sink segments may matingly engage the medial portion of the base. A method for forming a heat sink comprises fabricating a heat-generating element contacting portion, constructing a plurality of heat sink segments, and assembling the plurality of heat sink segments to connect to and extend outwardly from the bottom surface of the heat-generating element contacting portion.

Abstract: A luminaire comprising a base, an optic attached to the base, a heat sink integrally molded within the base, and a heat-generating element comprising an LED-based light source in thermal communication with the heat sink. The light source may be positioned such that light emitted by the LED is emitted into an optical chamber defined by the first housing. A second housing may comprise channels formed by opposing pairs of fin guards. The heat sink may comprise a plurality of fin assemblies connected along a perimeter of a heat-generating element contacting portion of the heat sink. A proximal edge of each fin assembly may be positioned adjacent to an outer surface of the first housing. A distal edge of each fin assembly may be positioned so as to be coextensive with a respective channel and substantially exposed to the environment external to the luminaire.