Abstract: Electronic circuitry for color-mixing in an LED light fixture during AC power dimming is disclosed to achieve adjustable color temperature. According to one embodiment, a dimmable LED light fixture has first, second, and third LED light sources, the first and second LED light sources producing white light, the third LED light source producing colored light, the LED driver configured to power the LED light sources by providing a single-channel variable-DC current source having two output terminals, and a current regulator for maintaining the current in the third LED light source path substantially constant as the LED driver output current is decreased when the AC power is reduced by the dimmer module, thereby altering the color of the light produced by the combination of the LED light sources.

Abstract: A one-piece, sloped baffle includes a generally cylindrical central opening having a central axis extending between an open circular end and an open elliptical end. A plane defining the open circular end is perpendicular to the central axis. A plane defining the open elliptical end is at an oblique angle relative to the central axis. The baffle further includes an opening extending between the ends and a pair of opposing edges substantially parallel with the central axis and on opposite sides of the opening. First projections are positioned on opposite sides of the opening and aligned with the opposing edges. Second projections are positioned on opposite sides of the opening at a radial distance from the first projections. The baffle further includes a plurality of grooves that extend circumferentially around an inner surface of the baffle.

Abstract: A lighting mount assembly and method are disclosed to mount a recessed light fixture in an opening in a wall. The lighting mount assembly includes a mounting frame, and at least two adjustable brackets which are movable relative to the mounting frame. The mounting frame and the brackets cooperate to clamp a portion of the wall from opposing sides. Each of the brackets also includes a resilient member, such as a leg spring, which can be engaged to and disengaged from a portion of a light fixture, such as a groove, to hold or release the recessed light fixture in the wall opening.

Abstract: An edge-fed waveguide luminaire includes a light waveguide having a planar body, a waveguide edge support structure, and an anchor opening in the planar body of the light waveguide, which is displaced from said waveguide edge support structure. A sensor is fixed in the anchor opening of said light waveguide so as to be responsive to conditions in the space below the luminaire. The sensor, which will have minimal impact on the aesthetic qualities of the luminaire, is in communication with light switching means for adjusting the light output from the luminaire in response to changes in conditions in the space below the luminaire.

Abstract: Systems and methods are disclosed for adjusting the correlated color temperature (CCT) reflecting the warmth of emitted light for a non-tungsten based lighting device as intensity of the lighting device is modified. The CCT of the non-tungsten based lighting device is determined at a lighting control device that can provide fixture-dependent driver levels to various lighting devices of varying types. A lighting controller engine can determine a white component color temperature value based on a desired intensity level and a default CCT value received via a user interface of the lighting control device. The lighting control device can determine the driver levels for controlling characteristics of light emitted from the non-tungsten based lighting device based on the white component color temperature value and a user defined color level. The lighting control device can scale the white component color temperature to reflect variations of warmth as the intensity level is adjusted.

Abstract: A power cord integrated hanger system for suspending a lighting fixture has a flexible load bearing inner suspension part and a flexible non-load bearing outer conductor part that acts as the “power cord” for the suspended lighting fixture. The flexible outer conductor part has an internal passageway for the inner suspension part. An outer cover of the outer conductor part holds electrical conductors in place in the outer conductor part and preferably conceals the conductors from view. The outer cover of the conductor part can be provided with different aesthetic qualities to enhance the visual appearance of the hanger system.

Abstract: Described is an electronics assembly that includes an electronics carrier comprising a cavity and a plurality of modules disposed within the electronics carrier. Each module may include a power handling component mounted on a printed circuit board and a dielectric barrier mechanically attached to the printed circuit board to electrically isolate the power handling component of the module from an adjacent module disposed within the electronics carrier. The dielectric barrier may mechanically attach to the electronics carrier.

Abstract: A universal load control module may include a power supply that operates over a wide voltage range, a microcontroller, and one or more functional control blocks. A functional control block may include a dimmer circuit for controlling a lighting load that provides reverse phase cut mode dimming, forward phase cut mode dimming, and hybrid phase cut mode dimming, as well as thermal protection. One or more universal control modules may be housed in a cabinet that include a cabinet control module. The cabinet may include additional thermal protection measures.

Abstract: Embodiments of the invention include a luminaire that includes a plurality of different light engines. Light engines having different light distributions can be included in a single luminaire and a subset of the light engines selectively driven to dynamically change the light distribution of the luminaire. In this way, a single luminaire is capable of illuminating an area with a variety of different light distributions.

Abstract: A universal load control module may include a power supply that operates over a wide voltage range, a microcontroller, and one or more functional control blocks. A functional control block may include a dimmer circuit for controlling a lighting load that provides reverse phase cut mode dimming, forward phase cut mode dimming, and hybrid phase cut mode dimming, as well as thermal protection. One or more universal control modules may be housed in a cabinet that include a cabinet control module. The cabinet may include additional thermal protection measures.

Abstract: Disclosed are optics over a light source, such as, but not limited to, an LED on a circuit board. The optic does not entirely encapsulate the LED but rather includes an inner surface such that an air gap exists between the optic and the LED. The optic may include a lens and may conform to the shape of the circuit board.

Abstract: A high bay light fixture includes a substantially disc-shaped base, disposed horizontally so as to define an upper surface, a lower surface and a vertical axis. Groups of first light emitting diodes (LEDs) couple with the lower surface of the base. The LEDs within each group of first LEDs are arranged along one or more arcs of substantially constant radius relative to the vertical axis. At least one lower optic couples with the lower surface of the base such that the lower surface and the lower optic enclose the groups of the first LEDs. A plurality of second LEDs couples with the upper surface of the base. Upper optics couple with the upper surface of the base, such that the upper surface of the base and each of the upper optics enclose at least one of the second LEDs.

Abstract: A gestural control dimmer switch for controlling the illumination level of a light using hand movements includes a dimmer panel having a continuum of positions associated with a spectrum of illumination levels of the light. Hand position sensors produce a hand position detection field in front of the continuum of positions of the dimmer panel through which a hand can be passed. No dimming input is produced by a hand passing through the hand position detection field until the hand passing through the detection field reaches a set trigger position at one of the continuum of positions along the dimmer panel. A dimming input is only produced in response to changes in hand position in the hand position detection field after the hand reaches the trigger position. A new trigger position is set after the illumination level of the light controlled by the dimmer switch is adjusted.

Abstract: A single board light engine includes an AC to AC step driver that selectively powers multiple LED segments by controlling tap points between the LED segments as the input voltage goes from zero crossover to maximum voltage and returns to zero crossover. The step driver may power a first LED segment, a second LED segment, both the first and second LED segments, or none of the LED segments depending upon the input voltage level. The LEDs within an LED segment may share a characteristic that differs from a characteristic shared by LEDs in another segment, which allows the LED fixture to provide a variety of lighting effects.

Abstract: A single board light engine includes an AC to AC step driver that selectively powers multiple LED segments by controlling tap points between the LED segments as the input voltage goes from zero crossover to maximum voltage and returns to zero crossover. The step driver may power a first LED segment, a second LED segment, both the first and second LED segments, or none of the LED segments depending upon the input voltage level. The LEDs within an LED segment may share a characteristic that differs from a characteristic shared by LEDs in another segment, which allows the LED fixture to provide a variety of lighting effects.

Abstract: An electronic apparatus, such as a lighting fixture, includes a substrate, an electronic device such as a chip-on-board light emitting diode and a thermal interface located between the substrate and the electronic device. The thermal interface includes at least two distinct materials, including a dielectric material and a thermally conductive material. The dielectric material includes a cutout into which the thermally conductive material is located. The dielectric material can completely surround the perimeter of the electronic device or can be located proximate portions of the electronic device that are prone to arcing in order to protect the substrate from arcing. The electronic apparatus operates at a reduced temperature as compared to an electronic apparatus that does not include the thermal interface. Methods for making an electronic apparatus having a thermal interface with a discrete dielectric material and thermally conductive material are also described.

Abstract: A light fixture including an electronic housing and at least one optical chamber positioned on each side of the electronic housing. In some embodiments, the optical chambers are positioned a distance from the electronic housing so as to avoid creation of a thermal path between the optical chambers and the electronic housing. Each optical chamber includes a heat sink and a plurality of LEDs mounted on a PCB that is, in turn, mounted on the heat sink. A reflector is positioned over at least a portion of the PCB. In some embodiments, vents extend through the heat sink and a fin extends upwardly from the heat sink and angles at least partially over at least some of the vents. In use, air enters the optical chambers and exits the fixture through the top vents in the heat sink. The air circulates over the reflector, carrying heat from the reflectors during the process. Heat is also conducted to the air from the heat sink.

Abstract: A shield for a light emitting diode (LED) luminaire includes a frame mountable to the LED luminaire such that the shield is removable therefrom. A plurality of rows of shield surfaces contact the frame and have a first side that faces a row of LEDs located on the LED luminaire and an opposite second side. The first side has a fully or partially reflective surface. The plurality of rows of shield surfaces prevent light from the LEDs from reflecting toward the back of the LED luminaire. The shield may include notches for allowing removal of one or more of the plurality of rows of shield surfaces or a portion thereof from the frame and for customization of light distribution from the LED luminaire. The shield may also be cut lengthwise such that each of the plurality of rows of shield surfaces includes a partial shield surface and shields only a portion of a row of LEDs located on the LED luminaire.