Abstract: An apparatus comprising an enclosure including a sidewall having an exterior shape defined at least in part by a plurality of sides, at least one curve, an ellipsoid, a cone, a cylinder, a polygon or a polyhedron. The enclosure forms a cavity, surrounded by the sidewall, to contain electrical wires providing a connection to mains electricity power from an electrical system of a building. A first telescoping hangar bar assembly is disposed on and in direct contact with a first portion of the sidewall of the enclosure, and a second telescoping hangar bar assembly is disposed on and in direct contact with a second portion of the sidewall of the enclosure opposite to the first portion of the sidewall.

Abstract: A hanger bar assembly comprises a first hanger bar, a second hanger bar, and a hanger bar holder. The first hanger bar and the second hanger bar are mechanically coupled where the first hanger bar slides relative to the second hang bar in a telescopic manner. The first hanger bar and the second hanger bar both include an interlocking structure that interlocks the first hanger bar with the second hanger bar, reducing lateral movement, such as backlash or slop. The hanger bar holder is used to hold at least one of the first hanger bar or the second hanger bar. The hanger bar holder includes a first section to guide at least the first hanger bar and a second section to guide at least the second hanger bar. The first section and the second section also constrain lateral movement of the first hanger bar and the second hanger bar, respectively.

Abstract: A lighting assembly includes a light source module including at least one LED, an AC to DC converter to receive an AC voltage and supply regulated electrical energy to power the light source module, a lens, and a heat-sinking unified casting. The casting includes a closed rear wall and a sidewall that defines a casting cavity containing the at least one LED. The closed rear wall and the sidewall are formed of a heat conductive material to dissipate heat generated by the light source module, and the sidewall has at least one exterior width dimension of less than 3½ inches. The assembly also includes a front end face coupled to the sidewall, and a twist-and-lock mechanism comprising multiple flanges that extend radially outward from a perimeter of the front end face, and/or at least one groove and/or at least one slot to form a twist-and-lock friction connection with a trim.

Abstract: An LED lighting apparatus comprises a housing having at least one sidewall, an LED board, a lens having a back side facing the LED board and a front side opposite to the back side, and a driver module cover. The lens is disposed with respect to the LED board such that the plurality of the LEDs illuminate the back side of the lens. An adapter bracket is employed to couple the LED lighting apparatus to a junction box installed and positioned above the ceiling such that when the apparatus is snapped into the junction box, the driver module cover is at least partially disposed in the junction box.

Abstract: An LED downlighting apparatus includes a housing with a sidewall having a front facing edge and a back facing edge positioned adjacent to a ceiling when the LED downlighting apparatus is installed in an opening of the ceiling. A depth of the sidewall is less than one inch and a thickness of at least a portion of the sidewall is less than three millimeters. An LED board and a lens are coupled to the housing. The lens is disposed with respect to the LED board such that the lens is illuminated from a back side. One or more mechanical couplers snap fit the apparatus to a junction box installed and positioned above the ceiling such that when the apparatus is snap fit to the junction box through the opening of the ceiling, the housing appears to be surface mounted to the ceiling.

Abstract: A lighting apparatus includes a housing structure having a rear face, a sidewall, a front end face, a partition to divide an interior cavity of the housing structure into a top portion and a bottom portion, and at least one exterior width dimension such that at least a portion of the housing structure fits into a space having a width of less than 3.5 inches. A light source module is positioned in the bottom portion of the housing structure, and an AC to DC converter is positioned in the top portion of the housing structure to power the light source module. A reflecting element is positioned to direct light produced by the light source module out of the housing structure. At least a portion of a front surface of a substantially flat lens is substantially coplanar with an exterior surface of the front end face of the housing structure.

Abstract: A recessed lighting system includes a casting, a light source module and one or more optic elements disposed in the casting, and a driver to power the light source module. In one example, the system also includes a junction box or a 4-10 inch recessed lighting fixture enclosure in which the casting is disposed. The system may also include a trim to cover an exposed edge of a hole in a ceiling or a wall into which the recessed lighting system is installed. The system also may include one or more connecting mechanisms to couple the trim to one or both of the junction box/enclosure and the casting. In one example, the casting includes a front end face and the one or more connecting mechanisms couple the trim to the front end face of the casting. The connecting mechanism(s) may include a twist-and-lock friction connection.

Abstract: Light output from an LED light source is increased or reduced in response to adjustment of a triac-based dimmer having a triac holding current to maintain conduction of the dimmer. An LED controller to control the light output includes a voltage-controlled impedance to provide an adaptive holding current that causes a triac current of the dimmer to be greater than the triac holding current, particularly when the dimmer is adjusted for significantly low light output (e.g., less than 5%, 2%, or 1% of full power light output). The adaptive holding current also allows for smooth increase of the light output starting from low light output, without perceivable flicker or shimmer. In one example, the voltage-controlled impedance is a resistive-like impedance that is placed on a secondary side of a transformer providing power to the LED light source. In another example, the voltage-controlled impedance is not pulse width modulated.

Abstract: In one example, an apparatus comprises a compact recessed lighting module, the compact recessed lighting module configured to be housed in and attachable to a junction box, the compact recessed lighting module including a monolithically formed unified casting, the unified casting having a cavity defined therein, a light source module disposed within the cavity, the light source module configured to emit light, and a driver configured to power the light source module. The monolithically formed unified casting has a plurality of fins defined in the outer surface thereof and a plurality of twist and lock tabs defined therein.

Abstract: Light output from an LED light source is increased or reduced in response to adjustment of a triac-based dimmer having a triac holding current to maintain conduction of the dimmer. An LED controller to control the light output includes a voltage-controlled impedance to provide an adaptive holding current that causes a triac current of the dimmer to be greater than the triac holding current, particularly when the dimmer is adjusted for significantly low light output (e.g., less than 5%, 2%, or 1% of full power light output). The adaptive holding current also allows for smooth increase of the light output starting from low light output, without perceivable flicker or shimmer. In one example, the voltage-controlled impedance is a resistive-like impedance that is placed on a secondary side of a transformer providing power to the LED light source. In another example, the voltage-controlled impedance is not pulse width modulated.

Abstract: A thin profile surface mount LED lighting apparatus includes a housing, an LED board including multiple LEDs, and a lens. The lens has a back side facing the LED board and a front side that provides a downward facing surface when the LED lighting apparatus is installed in an opening of a ceiling. The lens is disposed with respect to the LED board such that the LEDs illuminate the back side of the lens. A first spacing of the LEDs causes resulting light from the downward facing surface of the lens to be substantially uniform during operation of the apparatus. In one example, a thin front edge of a sidewall of the housing, forming a perimeter around the lens, is flush with the lens and is appreciably thin (e.g., a thickness of less than three millimeters), and a depth of the sidewall housing is less than one inch.

Abstract: An adjustable lighting apparatus includes a lighting module that is rotatably adjustable about a first rotation axis relative to an adjustable mount. The lighting module may include a heat sink, a driver, and a light source. The adjustable mount may include a base structure, a retainer, a shield, and a secondary shield. A trim may also be coupled to the adjustable mount. In some implementations, the lighting module translates along a first translation axis defined by the adjustable mount while rotating about the first rotation axis in order to reorient the light source while reducing shading losses caused by the adjustable mount. Openings in the base structure and the shield may be substantially covered at all rotational positions of the lighting module using a combination of the shield, the trim, the heat sink, and the secondary shield, thus eliminating the need for an additional enclosure.

Abstract: Light output from an LED light source is increased or reduced in response to adjustment of a triac-based dimmer having a triac holding current to maintain conduction of the dimmer. An LED controller to control the light output includes a voltage-controlled impedance to provide an adaptive holding current that causes a triac current of the dimmer to be greater than the triac holding current, particularly when the dimmer is adjusted for significantly low light output (e.g., less than 5%, 2%, or 1% of full power light output). The adaptive holding current also allows for smooth increase of the light output starting from low light output, without perceivable flicker or shimmer. In one example, the voltage-controlled impedance is a resistive-like impedance that is placed on a secondary side of a transformer providing power to the LED light source. In another example, the voltage-controlled impedance is not pulse width modulated.

Abstract: The present embodiments relate to an advanced error free occupancy detection system based on thermal infrared (IR) imaging and located in ceiling luminaires. The occupancy detection system includes a plurality of luminaires configured to wirelessly communicate with each other. Each luminaire of the plurality of luminaires includes a wireless interface, and a thermal IR imaging sensor and a microcontroller. The wireless interface is configured to communicate with the rest of the plurality of luminaires. The thermal IR imaging sensor is configured to collect thermal IR images of a vicinity of the luminaire. The microcontroller is configured to process the thermal IR images for detecting one or more humans in the vicinity of the luminaire and to generate dimming signals for one or more of the plurality of luminaires based on the detection.

Abstract: A housing has a sidewall that surrounds an interior cavity that has an open rear end and an open front end, and is divided by a partition into a top cavity and a bottom cavity. The top cavity extends to the open rear end, the bottom cavity extends to the open front end. A power supply circuit board is inside the top cavity, while a light source is inside the bottom cavity and emits light through the open front end to illuminate a room. First wires pass through an opening in the partition, and are coupled to the power supply circuit board at one end and to the light source at another end, to deliver power to the light source. A lid or cover covers the open rear end enclosing the top cavity, and is secured to the housing. Other embodiments are also described and claimed.