A lamp power supply includes: a housing, a main circuit board, and an end cover, where the circuit board is disposed in the housing, the end cover is connected to an open end of the housing, the end cover is provided with a through hole running through a surface of the end cover, a rubber stopper is disposed in the through hole, the rubber stopper includes an elastic pressing portion, an end of which protrudes upward from the surface of the end cover and an other end of which is located in the through hole, and the elastic pressing portion is connected with a conductive portion. The sub-circuit board is electrically connected to the conductive portion of the elastic pressing portion.

A recessed lighting fixture comprises a generally annular body having a central cavity in the form of a partially spherical socket. There is a lighting support member having a partially spherical exterior portion which is closely fitted within the partially spherical socket of the annular body. The lighting support member is pivotable relative to the annular body, but air flow between the partially spherical socket of the annular body and the partially spherical exterior portion of the lighting support member is substantially restricted. There may be a light source mounted to the lighting support member adjacent a bottom thereof. The light source may be a light-emitting diode.

A first LED with a first LED sidewall is disclosed. A second LED with a second LED sidewall facing the first LED sidewall is also disclosed. A first dynamic optical isolation material between the first LED sidewall and the second LED sidewall and configured to change an optical state based on a state trigger such that a light behavior at the first LED sidewall for a light emitted by one of the first LED and the second LED is determined by the optical state, is also disclosed.

A light assembly includes a base, and a first light source supported by the base. The first light source includes a first light emitting diode configured to emit light in a first direction from the base. The light assembly additionally includes a second light source supported by the base, the second light source including a plurality of second light emitting diodes configured to emit light in a second direction from the base. The second light source is obliquely oriented relative to the base. The light assembly additionally includes a diffuser supported by the base, the diffuser extending upwardly from the base to enclose the first light source. The diffuser diffuses light emitted from the first light source to the surrounding area in an upward and outward direction.

A light assembly includes a base, and a first light source supported by the base. The first light source includes a first light emitting diode configured to emit light in a first direction from the base. The light assembly additionally includes a second light source supported by the base, the second light source including a plurality of second light emitting diodes configured to emit light in a second direction from the base. The second light source is obliquely oriented relative to the base. The light assembly additionally includes a diffuser supported by the base, the diffuser extending upwardly from the base to enclose the first light source. The diffuser diffuses light emitted from the first light source to the surrounding area in an upward and outward direction.

A compact precision illumination source mounts on a finger of a user for providing localized illumination for precision tasks such as surgical procedures and other tasks performed in dark or confined spaces. A frame having a circular or arcuate shape engages the finger, and secures an enclosure having a small but powerful bright, light focused on a predetermined region defined by the end of the digit that is likely the activity region for an instrument grasped by the digit. The frame engages a charge module for aligning external conductors for recharging a power supply in the illumination source.

An LED lamp and it power source module are provided. The LED lamp includes an LED module and a power source module. The power source module includes two rectifying circuits, a filtering capacitor, a plurality of fuses, two filament-simulating circuits, and a discharge device. Each of the filament-simulating circuits is configured to allow a current to flow from one pin to the other pin via the corresponding first and second filament-simulating circuits during a pre-heat process executed by a ballast.

An LED lamp and it power source module are provided. The LED lamp includes an LED module and a power source module. The power source module includes two rectifying circuits, a filtering capacitor, a plurality of fuses, two filament-simulating circuits, and a discharge device. Each of the filament-simulating circuits is configured to allow a current to flow from one pin to the other pin via the corresponding first and second filament-simulating circuits during a pre-heat process executed by a ballast.

An integrated ceiling device includes a housing retaining an electronic assembly, a heat sink having a central opening, a light source coupled onto the heat sink, the housing is coupled with and disposed at least partly above the heat sink, and a central vertical axis of the housing aligns or is in proximity with the central opening of the heat sink.

An integrated ceiling device includes a housing retaining an electronic assembly, a heat sink having a central opening, a light source coupled onto the heat sink, the housing is coupled with and disposed at least partly above the heat sink, and a central vertical axis of the housing aligns or is in proximity with the central opening of the heat sink.