Abstract: The present disclosure provides a dynamic pulse width modulation (PWM) system that includes current frequency determination circuitry to determine a DC value of a source current, and to determine a frequency of the source current generate a plurality of pulses from an AC power source; and PWM generation circuitry to generate a first PWM signal having a first frequency based on the DC value of the current source; the PWM circuitry also to generate a second PWM signal having a second frequency based on the frequency of the current source; wherein the first frequency is less than the second frequency.

Abstract: An emergency luminaire includes an emergency luminaire light source to emit emergency illumination lighting. The emergency luminaire also includes an emergency luminaire power supply configured to be driven by an emergency power line. The emergency luminaire further includes emergency luminaire programming, wherein execution of the emergency luminaire programming configures the emergency luminaire to implement the following functions. The emergency luminaire tracks an active message gap time. In response to receiving a normal power active message from a respective member device of a plurality of member devices of a lighting control group before the tracked active message gap time exceeds an active message timeout, the emergency luminaire resets the active message gap time.

Abstract: The present disclosure provides a dynamic pulse width modulation (PWM) system that includes current frequency determination circuitry to determine a DC value of a source current, and to determine a frequency of the source current generate a plurality of pulses from an AC power source; and PWM generation circuitry to generate a first PWM signal having a first frequency based on the DC value of the current source; the PWM circuitry also to generate a second PWM signal having a second frequency based on the frequency of the current source; wherein the first frequency is less than the second frequency.

Abstract: A lighting system for a ceiling grid system may provide lighting at a location below the ceiling grid system. The light fixture includes a light source and a support member, and the light fixture may provide diffusely reflected light to a ceiling grid opening. The light fixture may include a wall assembly that is adapted to be moved between a folded configuration and an unfolded configuration.

Abstract: A constant power backup power supply for LED lighting fixtures is disclosed. The power supply includes a storage battery that is charged while an AC power source is in an ON condition. When AC power transitions to an OFF condition, a capacitor bank charged by the battery supplies current to the primary side of a flyback converter operating in discontinuous conduction mode. The secondary side of the flyback converter supplies constant output power to the LED lighting fixture for an arbitrary output voltage within a predetermined range.

Abstract: A light system may include a luminaire comprising one or more light emitters and at least one optic. The light system may include a remote phosphor mask that is reversibly coupled with the luminaire using at least one reversible coupling mechanism. The remote phosphor mask may include one or more phosphors admixed with an optical material. The one or more phosphors may be capable of adjusting a color temperature of emitted light from the luminaire.

Abstract: A lighting system includes a plurality of lighting system elements. The lighting system elements include a luminaire and a reporting device. The luminaire includes a light source to emit illumination light. The reporting device includes a reporting device network communication interface system for network communication, a reporting device processor, a reporting device memory, and reporting device programming in the reporting device memory. Execution of the reporting device programming causes the respective reporting device to collect a respective performance metric of a respective luminaire and submits a respective claim including the respective performance metric to one or more storage devices. A respective storage device validates a plurality of claims, including the respective claim. The storage device stores the subset or all of the plurality of claims in a block in at least one storage device of the one or more storage devices. The block includes a lighting value token.

Abstract: A lighting fixture may include a housing, an illumination source disposed within the housing, and a frame coupled to the housing. The frame may include a first side and a second side abutting the first side to form a joint, wherein a gap extends at the joint and at least one of the first side or the second side is configured to obscure at least a portion of the gap.

Abstract: The systems and methods disclosed herein include a handheld programmer for replacing LED drivers in the field. The handheld programmer includes a communications module configured to communicate with a first light emitting diode (LED) driver and a second LED driver, and a processor configured to read a plurality of settings from the first LED driver and program the second LED driver with the plurality of settings from the first LED driver.

Abstract: An anti-glare refractor for a luminaire may include an optic body having a light entrance side and a light exit side. The optic body may include a material characterized by an index of refraction. The light entrance side may include a substantially flat surface, and the light exit side may include a plurality of prisms each defined by a plurality of facet surfaces. Each facet surface may have a prism slope angle with respect to the substantially flat surface. The prism slope angle may be in a range from about 5 degrees to about 45 degrees.

Abstract: A lighting system for a ceiling grid system may provide lighting at a location below the ceiling grid system. The light fixture includes a light source and a support member, and the light fixture may provide diffusely reflected light to a ceiling grid opening. The light fixture may include a wall assembly that is adapted to be moved between a folded configuration and an unfolded configuration.

Abstract: An ultraviolet (“UV”) emission device may emit energy towards a movable surface of a conveyor system. A housing of the UV emission device may attach to a frame of the conveyor system. A lateral edge of the housing may extend across the moveable surface. The housing and a portion of the moveable surface may be inclined with respect to the frame. A barrier bracket of the UV emission device may support an absorptive barrier along the lateral edge, the absorptive barrier configured to contact the moveable surface. In a first position of the barrier bracket, the absorptive barrier contacts the moveable surface and the barrier bracket activates an interlock switch. In a second position of the barrier bracket, the barrier bracket deactivates the interlock switch. Responsive to deactivation of the interlock switch, a controller may provide a control signal to decrease power to the UV energy emission element.

Abstract: An optical assembly and a luminaire with extreme cutoff beam control optics. The optical assembly includes a base, a plurality of lenses, a plurality of light emitting diodes (LED) positioned to emit light into the lenses, and a reflector having a reflective surface disposed adjacent at least one of the plurality of LEDs. The optical axis of one or more of the LEDs may be offset from a central axis of the respective lens in which it emits light. The reflective surface of the reflector may extend from the base over the one or more of the LEDs and beyond the optical axis of the one or more LEDs to direct light in a desired direction or toward a selected area (e.g., a street) and cut off light directed in an undesirable direction or area (e.g., a house).

Abstract: A luminaire includes a luminaire control circuit and a disinfection light source to emit a disinfection light in an ultraviolet (UV) band for disinfecting a vicinity of a space of a target pathogen that is exposed to the disinfection light. The UV band is 200 nanometers (nm) to 230 nm wavelength. The luminaire initiates a dose cycle of a vicinity in which the disinfection light source emits the disinfection light continuously or during a plurality of periods of a dose cycle from the disinfection light source by recording a beginning time of the dose cycle. The luminaire controls, via a driver circuit, the disinfection light source over the dose cycle to emit the disinfection light continuously or during the plurality of periods for disinfecting the vicinity to substantially obtain a target pathogen UV radiation level and restrict a total UV radiation threshold exposure level by a UV radiation threshold limit.

Abstract: A photocontrol, such as for an outdoor intelligent lighting fixture, may detect levels of ambient light at multiple sections of the photocontrol. The ambient light may be detected via multiple photosensors located at the photocontrol sections. In addition, the ambient light may be detected via multiple color filters (or sections of a color filter) located at the photocontrol sections. The photocontrol may determine an ambient light differential, such as an instant differential between light received at the multiple photocontrol sections at a particular time, or a temporal differential between light received at the multiple photocontrol sections across multiple times. Based on the ambient light differential, the photocontrol may identify triggering photosensor or triggering section that substantially align with a geographical orientation. The photocontrol may identify a lighting output profile. An output level of a lighting element may be modified based on the lighting output profile.

Abstract: An ultraviolet (“UV”) emission device may emit energy towards a movable surface of a conveyor system, A housing of the UV emission device may attach to a frame of the conveyor system. A lateral edge of the housing may extend across the moveable surface. The housing and a portion of the moveable surface may be inclined with respect to the frame. A barrier bracket of the UV emission device may support an absorptive barrier along the lateral edge, the absorptive barrier configured to contact the moveable surface. In a first position of the barrier bracket, the absorptive barrier contacts the moveable surface and the barrier bracket activates an interlock switch. In a second position of the barrier bracket, the barrier bracket deactivates the interlock switch. Responsive to deactivation of the interlock switch, a controller may provide a control signal to decrease power to the UV energy emission element.