Abstract: A HID solid state retrofit lamp includes a circumferential array of solid state light sources mounted on circuit boards, a heat sink located in the lamp's interior volume, and a fan positioned in the interior volume to force airflow across the heat sink. A capper assembly includes at least one aperture to vent the interior volume, and an intermediate circuit board within the capper assembly. The intermediate circuit board distributes electrical power to the circuit boards by tabs and contacts extending from the boards that are mechanically bonded together. An optical transmissive shield is positioned exterior to the circumferential array, and can include prismatic structures to direct light emitted from the LED sources in an off axis direction.

Abstract: A lamp assembly includes a base, a hermetically sealed outer jacket mounted on the base, and a driver circuit disposed within the hermetically sealed outer jacket and electrically coupled to the base. The lamp assembly may also include a safety circuit configured to interrupt electrical power to the lamp assembly if the hermetically sealed outer jacket is compromised.

Abstract: A HID solid state retrofit lamp includes a circumferential array of solid state light sources mounted on circuit boards, a heat sink located in the lamp's interior volume, and a fan positioned in the interior volume to force airflow across the heat sink. A capper assembly includes at least one aperture to vent the interior volume, and an intermediate circuit board within the capper assembly. The intermediate circuit board distributes electrical power to the circuit boards by tabs and contacts extending from the boards that are mechanically bonded together. An optical transmissive shield is positioned exterior to the circumferential array, and can include prismatic structures to direct light emitted from the LED sources in an off axis direction.

Abstract: A solid state lamp for retrofit of an HID includes a circumferential array of solid state light sources mounted on circuit boards, a heat sink located in the lamp's interior volume, and a fan positioned in the interior volume to force airflow across the heat sink. A capper assembly includes at least one aperture to vent the interior volume, and an intermediate circuit board within the capper assembly. The intermediate circuit board distributes electrical power to the circuit boards by tabs and contacts extending from the boards that are mechanically bonded together. An optical transmissive shield is positioned exterior to the circumferential array, and can include prismatic structures to direct light emitted from the LED sources in an off axis direction.

Abstract: A position determination system is disclosed, which comprises a mobile device comprising at least two transducers, wherein each transducer is operably connected to at least one single board processor; and a plurality of markers, each associated with a position of an area of interest, the plurality of markers at least one of: operable to transmit signals recognizable by the at least two transducers, and comprising at least one feature recognizable by the at least two transducers.

Abstract: A position determination system is disclosed, which comprises a mobile device comprising at least two transducers, wherein each transducer is operably connected to at least one single board processor; and a plurality of markers, each associated with a position of an area of interest, the plurality of markers at least one of: operable to transmit signals recognizable by the at least two transducers, and comprising at least one feature recognizable by the at least two transducers.

Abstract: In an embodiment, the disclosure provides a light source comprising at least one solid state light emitter. The light source, in operation, emits substantially white light having a Lighting Preference Index (LPI) of at least about 105, and this emission from the light source comprises a UV-violet flux of at least about 1%. Use of the lamps, light sources, and methods of the present disclosure may afford the ability to display linens and clothing under energy-efficient LED-based illumination, and may impart an effect to (especially white) clothing, that makes them look cleaner than under illumination by prior art LED lamps.

Abstract: The present disclosure provides a lamp assembly (200), comprising a base (202), an outer jacket (204) mounted to the base (202), a first reflective substrate (206, 208) positioned within the outer jacket (204), and a first solid-state light source (220) disposed proximate the first reflective substrate (206, 208). The outer jacket (204) may be glass. The outer jacket (204) may hermetically seal the first solid-state light source (220).

Abstract: A solid state lamp for retrofit of an HID includes a circumferential array of solid state light sources mounted on circuit boards, a heat sink located in the lamp's interior volume, and a fan positioned in the interior volume to force airflow across the heat sink. A capper assembly includes at least one aperture to vent the interior volume, and an intermediate circuit board within the capper assembly. The intermediate circuit board distributes electrical power to the circuit boards by tabs and contacts extending from the boards that are mechanically bonded together. An optical transmissive shield is positioned exterior to the circumferential array, and can include prismatic structures to direct light emitted from the LED sources in an off axis direction.

Abstract: According to some embodiments, a system and housing provide a lamp including a heat sink including: an annular tube including a first end and a second end, a plurality of fins extending radially from an exterior surface of the annular tube, wherein a length of each fin extends from the first end of the annular tube to the second end of the annular tube; a plurality of light sources in thermal contact with the heat sink; a driver circuit operative to provide the input voltage and current for the plurality of light sources; and a capper positioned at the second end of the annular tube, wherein the capper is operative to be received in a socket. Numerous other aspects are provided.

Abstract: A position determination system is disclosed, which comprises a mobile device comprising at least two transducers, wherein each transducer is operably connected to at least one single board processor; and a plurality of markers, each associated with a position of an area of interest, the plurality of markers at least one of: operable to transmit signals recognizable by the at least two transducers, and comprising at least one feature recognizable by the at least two transducers.

Abstract: The present disclosure provides a lamp assembly (200), comprising a base (202), an outer jacket (204) mounted to the base (202), a first reflective substrate (206, 208) positioned within the outer jacket (204), and a first solid-state light source (220) disposed proximate the first reflective substrate (206, 208). The outer jacket (204) may be glass. The outer jacket (204) may hermetically seal the first solid-state light source (220).

Abstract: A lamp assembly includes a base, a hermetically sealed outer jacket mounted on the base, and a driver circuit disposed within the hermetically sealed outer jacket and electrically coupled to the base. The lamp assembly may also include a safety circuit configured to interrupt electrical power to the lamp assembly if the hermetically sealed outer jacket is compromised.

Abstract: A unitary heat sink that includes fins and roots configured to provide improved thermal management for solid state light sources. In an embodiment, the unitary heat sink includes a central hub portion composed of a thermally conducting metal, a plurality of fins projecting away from the central hub portion in a first direction, and a plurality of roots projecting away from the central hub portion in a second direction generally opposite from the first direction.

Abstract: In an embodiment, the disclosure provides a light source comprising at least one solid state light emitter. The light source, in operation, emits substantially white light having a Lighting Preference Index (LPI) of at least about 105, and this emission from the light source comprises a UV-violet flux of at least about 1%. Use of the lamps, light sources, and methods of the present disclosure may afford the ability to display linens and clothing under energy-efficient LED-based illumination, and may impart an effect to (especially white) clothing, that makes them look cleaner than under illumination by prior art LED lamps.

Abstract: A lamp base including a neutral contact and a line contact, a semiconductor transient protection device having three terminals. The semiconductor transient protection device being an integral portion of the lamp base. A first terminal of the semiconductor transient protection device in mechanical and electrical contact with the neutral contact, a second terminal in mechanical and electrical contact with the line contact, and a third terminal in electrical contact with a lead-in wire. The semiconductor transient protection device configured to isolate the line contact from the neutral contact during a first line voltage input, and to provide a low-resistance shunt path between the line contact and the neutral contact during a second line voltage input.

Abstract: A unitary heat sink that includes fins and roots configured to provide improved thermal management for solid state light sources. In an embodiment, the unitary heat sink includes a central hub portion composed of a thermally conducting metal, a plurality of fins projecting away from the central hub portion in a first direction, and a plurality of roots projecting away from the central hub portion in a second direction generally opposite from the first direction.

Abstract: A lamp base including a neutral contact and a line contact, a semiconductor transient protection device having three terminals. The semiconductor transient protection device being an integral portion of the lamp base. A first terminal of the semiconductor transient protection device in mechanical and electrical contact with the neutral contact, a second terminal in mechanical and electrical contact with the line contact, and a third terminal in electrical contact with a lead-in wire. The semiconductor transient protection device configured to isolate the line contact from the neutral contact during a first line voltage input, and to provide a low-resistance shunt path between the line contact and the neutral contact during a second line voltage input.

Abstract: According to some embodiments, a system and housing provide a lamp including a heat sink including: an annular tube including a first end and a second end, a plurality of fins extending radially from an exterior surface of the annular tube, wherein a length of each fin extends from the first end of the annular tube to the second end of the annular tube; a plurality of light sources in thermal contact with the heat sink; a driver circuit operative to provide the input voltage and current for the plurality of light sources; and a capper positioned at the second end of the annular tube, wherein the capper is operative to be received in a socket. Numerous other aspects are provided.