Abstract: A light fixture includes a body with a first section at a first end and a second section at a second end and a light source disposed inside the body at the first end. In an installed configuration, the body is at least partially located inside an electrical box such that the first section and the first end are disposed inside the electrical box. The light source aims light from the first end toward the second end to illuminate an architectural space.

Abstract: A Bluetooth beacon for a luminaire assembly includes a module and an antenna associated with the module. The Bluetooth beacon is monted such that the antenna is communicatively visible from a light emitting side of the luminaire assembly. The Bluetooth beacon is configured to provide a signal extending a predetermined distance from the luminaire assembly such that a Bluetooth receiver on a user device can receive a signal from the Bluetooth beacon.

Abstract: A bracket facilitates retrofit installation of items in a joist cavity. For example, the bracket permits mounting of a junction box containing a transformer, for use with low-voltage luminaire. The bracket wedges between the joists and provides a mounting for the junction box so that the junction box does not rest on a ceiling panel fixed to the underside of the joist cavity.

Abstract: A master lighting fixture and a satellite lighting fixture can each include an LED board including multiple LEDs that can emit visible light. A power supply and a LED regulator can be connected to the LED board in the master lighting fixture to provide power to operate the LED board. The LED board in the master lighting fixture can be connected to the LED board in the satellite lighting fixture to form a circuit to allow the power provided by the LED driver to be transmitted to the LED board in the satellite lighting fixture. A defect in the LED board in the master lighting fixture or the satellite lighting fixture can open the circuit, which can prevent power from being transmitted through the LED boards to enhance the performance of LEDs in the LED boards or reduce a risk of damage that can be caused by the LED boards.

Abstract: Optics for asymmetrically redirecting light from one or more light engines include a dome optic, and first and second reflecting surfaces. The dome optic refracts light emitted by the light engines. The first reflecting surface redirects at least a portion of the light that is initially emitted toward a backward horizontal direction, toward the forward horizontal direction. The first reflecting surface extends substantially vertically and along a transverse horizontal direction, proximate to and behind the dome optic, and has a height greater than or equal to a height of the dome optic. The second reflecting surface reflects downwardly at least a portion of the refracted light that is initially emitted in the forward horizontal direction. The second reflecting surface is proximate to the dome optic and forward of the dome optic, and forms an angle of 45 degrees or more with respect to vertical.

Abstract: Retention members for securing LED boards to substrates while permitting light from the LEDs to be emitted unobstructed. The present retention members may be in the form of clips that are designed to span an LED board and attach to a substrate so as to trap the LED board between a retention member and the substrate. The retention members described herein may include one or more retention features that may interface with a corresponding mounting feature formed on the substrate to secure the retention member and thus the LED board to a substrate.

Abstract: A composite light source includes a plurality of illumination panels, that emit light of a fixed color and a variable luminous intensity. Over time, the luminous intensities of at least two of the illumination panels vary, while a combined luminous intensity of the illumination panels remains about constant. Another composite light source includes a plurality of illumination panels that emit light. Each illumination panel of at least a first subset of the plurality of illumination panels emits the light with a first luminous intensity, and each illumination panel of at least a second subset of the plurality of illumination panels emits the light with a second luminous intensity that is different from the first luminous intensity.

Abstract: A system allows a light fixture to have a wider range of color temperatures (CCT) while limiting the warmest temperature reached at full intensity. The CCT of the light output may be controlled independently of intensity across a certain range of CCT and dependent on intensity across another range. In an implementation, both intensity and CCT may be adjusted from a single handle, where the interface positions may be divided into multiple zones. In another implementation, intensity may be adjusted from a first handle, while CCT may be adjusted from a second handle. The CCT of the light output may be limited to cooler levels when the intensity is higher, and/or the intensity of the light may be limited to lower levels when the CCT is warmer.

Abstract: The disclosed examples relate to methods and systems facilitate self-healing of regions of electrowetting devices. Electrowetting devices may be coupled to a switchable AC/DC electrical power supply that provides AC power to the electrowetting device to control electrowetting device operation and DC power to promote self-healing of the electrowetting device. A monitoring circuit outputs a signal in response to electrical power supply operating characteristic changes due to a failure of the electrowetting device's dielectric. The controller, responding to the signal, switches the power supply output from AC power to DC power to the electrowetting device. In response to the DC power, the electrowetting device responds by healing the degraded dielectric. When the failure is determined to be corrected, the power supply output is switched from DC power to AC power to the electrowetting device. The number of times self-healing is applied may be tracked for future analysis.

Abstract: A method of generating drive conditions for light sources to maintain a desired color of a light emitted by the light sources, as perceived by a human observer, over a change in a reference luminance, includes determining a corrected color that produces perception of the desired color, by the human observer, in the presence of the reference luminance; and determining light source drive conditions to produce the corrected color. A light fixture includes multiple illumination panels and control electronics. Some of the illumination panels emit a reference luminance; others emit light of an accent color different from the reference luminance. The control electronics modify an intensity level of the reference luminance, and compensate drive conditions supplied to LED chips that emit the accent color, to compensate the accent color for effects of modifying the intensity level, on human perception of the accent color.

Abstract: An in-grade light fixtures having hermetically sealed components that enable water and air to pass through the fixture to effectuate cooling without degrading the fixture components.

Abstract: A luminaire includes a light waveguide grid including an array of waveguides coupling respective illumination light source emitters of a general illumination device with respective gaps between respective pixel light emitters of an image display device. Each waveguide has a housing that includes an input interface optically coupled to the respective illumination light source emitter to steer illumination lighting from the illumination light source emitter. The housing also includes an output interface opposing the input interface and optically coupled to one or more gaps between pixel light emitters. The housing further includes at least one reflective wall having an internal reflective surface encompassing and extending from the input interface and the output interface. The structure of the waveguide may be optimized and/or additional technologies added to reduce optical losses and improve overall illumination efficiency of the luminaire.

Abstract: Exemplary systems, methods, and apparatuses for distributed intelligence in facility lighting control are provided. A facility lighting system may be organized into multiple control areas, each of which may include one or more component devices. Each lighting control area may be associated with a control apparatus, which controls the operation of the lighting devices of the associated control area based on various types of signal information. Signal information may include information concerning local conditions or environments, as well as information from a centralized control server. Some embodiments further include monitoring the operation and predicting fault states of the lighting control area.

Abstract: Aspects are provided for controlling outdoor lighting systems using a photocontrol interface that can be connected to a motion sensor and a luminaire driver or ballast. In some aspects, a dimming control node is electrically and communicatively coupled to a motion sensor via wired connections to a photocontrol interface. The dimming control node is also communicatively coupled to a luminaire ballast or driver. The dimming control node can provide power to the motion sensor. The dimming control node can also receive sensor data from the motion sensor via one of the wired connections. The dimming control node can determine a sensor output state of the motion sensor from the received sensor data, and can select a dim-level configuration corresponding to the determined sensor output state. The dimming control node can cause the luminaire ballast or driver to implement the selected dim-level configuration.

Abstract: A lighting device obtains data related to objects and boundaries in an area in the vicinity of the lighting device, and a user wearable device provides a display (e.g. an augmented reality display based on the data related to the objects and the area boundaries) for a user/wearer. The lighting device includes a mapping sensor that collects data related to the objects and boundaries in the area. The user wearable device includes a camera or other optical sensor and wireless communication capability. The user wearable device is provided with mapping data that is presented on a display of the user wearable device. The communications and display capabilities allow the user wearable device to obtain room mapping information related to area in the vicinity of the lighting device in order to provide navigational assistance to a visually impaired person in the area.

Abstract: A lighting relay panel may include lower-cost features or components related to improved safety and reliability. In some cases, the relay panel includes a power supply capable of protecting the panel from high-voltage and high-current transients. A microcontroller may determine a power interruption based on a zero-cross signal received from the power supply, and may also configure latching relays during the interruption. In some implementations, the relay panel includes a relay sense circuit that is capable of receiving actuation signals from multiple relays connected to different phases of a power signal, and the microcontroller may synchronize or repeat the actuations based on a signal from the relay sense circuit. The microcontroller may generate relay addresses based on the relay positions within the relay panel. In some cases, the relay panel may include isolation circuits that are capable of providing an isolated control signal having an improved voltage range.

Abstract: A device uses gated retro-reflectors to transmit uplink data in a visible light communication (VLC) system. The gated retro-reflector includes a retro-reflector and a gating shutter between the retro-reflector and a VLC light source. A light sensor receives VLC data at regular intervals in which a light pulse received during one of the intervals represents a first downloaded symbol and absence of a light pulse during another one of the intervals represents a second downloaded symbol. A controller controls the gating shutter to send uplink data from the device responsive to each received VLC light pulse. The controller opens the gating shutter during the reception of a VLC light pulse to upload a first uploaded symbol and closes the gating shutter during the reception of a VLC light pulse to upload a second uploaded symbol.

Abstract: A power line communication system and method permit auto-commissioning of multiple device control modules on a DC power line during the power up of the system. Device control modules associated with the peripheral devices are powered up sequentially and a unique address is assigned to each device controller when it is powered up. The device control modules have a unique circuit configuration that allows the use of inexpensive and mostly passive components. The cost effectiveness of the device controller design becomes particularly significant in applications, such as multi-panel OLED lighting fixtures, with high node counts.

Abstract: An LED luminaire includes a reflector, a channel, and a printed circuit board (PCB) onto which LEDs are mounted. Each of the reflector, the channel, and the PCB includes a feature(s) that permit their attachment to each other without the need for separate fasteners and tools. Embodiments of the LED luminaire may also include an optic and a pair of end caps, also designed for assembly into the LED luminaire without the use of or need for separate fasteners and tools.