Abstract: An apparatus for performing ultraviolet-deactivation of pathogens is disclosed. The disclosed apparatus includes a housing, a base member, one or more visible light assemblies, and one or more ultraviolet radiation assemblies. The housing is configured to define a downlight aperture region irradiated by the apparatus. The apparatus may additionally include sensors to detect whether a living organism occupies the downlight aperture region. The input from the sensors may be used to control the one or more ultraviolet radiation assemblies.

Abstract: A portal device for sanitizing an object is disclosed. The portal device comprises a frame enclosing a portal space sized to permit passage of a human therethrough and one or more irradiating units arranged about the frame. Each irradiating unit comprises one or more ultraviolet (UV) light sources configured to emit UV light to the portal space and one or more sensors configured to detect an object within the portal space. The portal device also comprises a processor configured to receive detection signals from the sensors, activate the UV light sources to emit UV light to the portal space at a wavelength of about 222 nm for a predetermined period of time in response to the detection signals, and deactivate the UV light sources after the predetermined period of time.

Abstract: A luminaire that includes a heat spreader, a heat sink diametrically outboard of the heat spreader, an optic retained by the heat spreader, a light source disposed on the front side of the heat spreader, and a power conditioner disposed on the heat spreader. The power conditioner is disposed on the same side of the heat spreader as the light source. The heat sink includes fins that alternate with adjacently disposed and radially oriented recesses.

Abstract: A downlight apparatus may include a canister with a canister body and a canister base comprising a female helical thread defined as an engagement host. The downlight apparatus may also include a lamp including a lamp body and a male helical ridge, defined as a lamp ridge. The lamp ridge includes a platform that extends distally from a root of the lamp ridge to a distance ranging from 2 to 20 times greater than the distance between the root and the crest of an Edison screw base thread. The lamp and the canister are structured to secure to one another when the lamp engages with the engagement host.

Abstract: A luminaire that includes a heat spreader, a heat sink diametrically outboard of the heat spreader, an optic retained by the heat spreader, a light source disposed on the front side of the heat spreader, and a power conditioner disposed on the heat spreader. The power conditioner is disposed on the same side of the heat spreader as the light source. The heat sink includes fins that alternate with adjacently disposed and radially oriented recesses.

Abstract: A downlight apparatus may include a canister with a canister body and a canister base comprising a female helical thread defined as an engagement host. The downlight apparatus may also include a lamp including a lamp body and a male helical ridge, defined as a lamp ridge. The lamp ridge includes a platform that extends distally from a root of the lamp ridge to a distance ranging from 2 to 20 times greater than the distance between the root and the crest of an Edison screw base thread. The lamp and the canister are structured to secure to one another when the lamp engages with the engagement host.

Abstract: An embodiment of the invention is directed to a light fixture useful for area lighting. The light fixture includes a housing having a base and a top, and a light emitting diode (LED) light emission module disposed within the housing. The light emission module includes a centrally disposed aperture that receives a centrally disposed power lead for powering the light emission module.

Abstract: An embodiment of the invention is directed to a light fixture useful for area lighting. The light fixture includes a housing having a base and a top, and a light emitting diode (LED) light emission module disposed within the housing. The light emission module includes a centrally disposed aperture that receives a centrally disposed power lead for powering the light emission module.

Abstract: An embodiment of the invention is directed to a light fixture useful for area lighting. The light fixture includes a housing having a base and a top, and a light emitting diode (LED) light emission module disposed within the housing. The light emission module includes a centrally disposed aperture that receives a centrally disposed power lead for powering the light emission module.

Abstract: An embodiment of the invention is directed to a light fixture useful for area lighting. The light fixture includes a housing having a base and a top, and a light emitting diode (LED) light emission module disposed within the housing. The light emission module includes a centrally disposed aperture that receives a centrally disposed power lead for powering the light emission module.