Abstract: A light fixture may include a light fixture housing defining an internal cavity. A light fixture may also include one or more light engines positioned within the internal cavity of the light fixture housing and designed to emit light for illumination. A light fixture may also include an external power driver positioned within the internal cavity of the light fixture housing and designed to receive power from an external power source, and provide power to and control the one or more light engines. A light fixture may also include a backup power supply positioned within the internal cavity of the light fixture housing, and a backup power driver positioned within the internal cavity of the light fixture housing and designed to receive power from the backup power supply, and provide power to and control the one or more light engines.

Abstract: An example luminaire includes a white light source (e.g. LEDs emitting white light in a region of the CIE color chart within three Macadam ellipses below the black body curve) and a violet light source emitting light in a wavelength range of approximately 380 nm to 450 nm (e.g. 405 nm LEDs) for deactivating bacteria, such as Methicillin-Resistant Staphylococcus aureus (MRSA) on a surface exposed to illumination from the luminaire. A controller coupled to the sources pulses the violet light source at an irregular rate and interval over a time period to apply a deactivation dosage of the violet light to bacteria within range of the emissions. When ON, the violet source emits light for deactivating bacteria at an intensity higher than the concurrent intensity of the white light.

Abstract: An example control system includes a set of light fixtures connected to a hub, where each light fixture includes a hub-communication device configured to communicate with the hub and a direct communication device configured to communicate directly with other light fixtures. Together, the light fixtures form a mesh network facilitated by the use of their direct communication devices. An external device communicates an instruction to a light fixture, and the instruction is propagated throughout the mesh network through communications among the light fixtures using their respective direct communication devices. As a result, each light fixture to which the instruction applies receives and complies with the instructions. The light fixtures are also configured to receive instructions from the hub, such that a light fixture is configured to receive instructions over dual networks.

Abstract: A mounting system for a recessed light fixture includes a frame and a holder supported by the frame. The holder includes a base and a support portion extending from the base. The support portion includes a top end, a bottom end opposite from the top end, and an edge extending from the top end to the bottom end. The edge includes a transition portion between the top end and the bottom end, a first step between the bottom end and the transition portion, and a plurality of second steps between the first step and the transition portion. At least one characteristic of the first step is different from each second step.

Abstract: A light fixture includes a housing containing a light engine, and a wireless baffle module. The wireless baffle module includes a baffle coupled to the housing and used for focusing light emitted from the light engine. The wireless baffle module further includes a wireless printed circuit board assembly coupled to an antenna. The wireless printed circuit board assembly receives and processes wireless signals from the antenna, and sends control signals to the light engine based on the wireless signals. The wireless baffle module may be coupled to a lighting system with an existing non-wireless module, or be used to replace a wireless baffle module with the same or different wireless protocol.

Abstract: An example method includes determining, at an aggregated point in time, an aggregated space node motion amount detected in a plurality of node sensing areas of a plurality of the nodes. The determining the aggregated space node motion amount includes compiling a plurality of sensing records from a subset or all of the nodes created by the subset or all of the nodes at a time substantially close to the aggregated point in time. The method additionally includes computing a temporal aggregated motion amount detected in a node sensing area of a respective node over time, using the aggregated time node motion amount. The method further includes computing a spatial aggregated motion amount in a portion of a space, using the aggregated space node motion amount, wherein the portion of the space correlates to the node sensing areas of the plurality of nodes.

Abstract: Disclosed herein is an optical assembly and a luminaire with extreme cutoff beam control optics. The optical assembly includes a base, a plurality of lenses disposed on the base and spaced from each other, a plurality of light emitting diodes (LED), and a reflector having a curved surface (e.g., concave shape, parabolic shape, etc.) disposed adjacent to at least one of the plurality of LEDs. A central axis of an LED may be offset from a central axis of the respective lens of the plurality of lenses. The curved surface may extend from the base and curving over the at least one of the plurality of LEDs and beyond the central axis of each of the at least one of the plurality of LEDs and direct light in a desired direction or a selected area (e.g., a street side) and cut off light in other direction (e.g., a house side).

Abstract: An example luminaire includes a white light source (e.g. LEDs emitting white light in a region of the CIE color chart within three Macadam ellipses below the black body curve) and a violet light source emitting light in a wavelength range of approximately 380 nm to 450 nm (e.g. 405 nm LEDs) for deactivating bacteria, such as Methicillin-Resistant Staphylococcus Aureus (MRSA) on a surface exposed to illumination from the luminaire. A controller coupled to the sources pulses the violet light source at periodic intervals or at random times. When ON, the violet source emits light for deactivating bacteria at an intensity higher than the concurrent intensity of the white light.

Abstract: A luminaire or lighting control device includes a network interface with a transceiver configured for communication via a lighting control network for lighting control and systems operations. The device can include a light source to emit illumination lighting, a driver circuit to control operation of the light source, and a power supply. The device includes a processor coupled to the network interface, and a memory accessible to the processor that stores a battery level threshold. The device includes programming in the memory. Execution of the programming by the processor configures the device to implement the following functions. First, the device receives a lighting control message. Second, the device determines a battery level of a power switch. Finally, in response to the battery level of the power switch being less than the battery level threshold, the device controls the luminaire or another luminaire to enter a low battery mode.

Abstract: A system for providing power over Ethernet emergency lighting is disclosed. The system includes a rechargeable battery pack that is charged without interfering with data signals present on a power over Ethernet link that provides normal lighting. The system includes a power loss monitor for monitoring the presence of normal lighting power present on a power over Ethernet link without interference.

Abstract: A lighting system includes an upper housing supporting a light engine, and a diffuser coupled to the upper housing. The diffuser may be monolithic, i.e. formed of a single material as a single piece without joints or seams where separate components are joined. The monolithic diffuser may be formed by an additive manufacturing process, for example 3D printing. The diffuser may couple to the upper housing with a tool-less connection. The portion of the tool-less connection defined by the diffuser may be formed by the additive manufacturing process. The lighting system may further include a lens coupled to the diffuser opposite the upper housing with a lens retaining ring. The lens retaining ring may be formed with an additive manufacturing process, and may define an annular snap-fit with the diffuser.