A light emitting diode (LED) circuit board includes a power input configured to supply power, a driving circuit configured to convert power, and a light emitting circuit configured to generate light. The power input is configured to supply power to the driving circuit. The driving circuit is configured to provide proper power to the light emitting circuit. The light emitting circuit is configured to generate light with the power provided by the driving circuit. An LED circuit board including a driving circuit, a light emitting circuit, and a plurality of semiconductor switches electrically connected between the driving circuit and the light emitting circuit is also provided. Each of the plurality of semiconductor switches is configured to electrically connect and electrically disconnect power from the driving circuit to the light emitting circuit.

There is provided a lighting device (100) comprising a housing comprising a frangible light exit window (110) and a fitting (120) including a first electrical connector (122) inside said housing. Within the housing there is a carrier assembly (130) comprising a plurality of SSL elements (132), and a second electrical connector (134) in contact with the first electrical connector (122). The second electrical connector (134) is held in contact with the first electrical connector (122) by the light exit window (110). This lighting device is relatively safe as if the light exit window (110) breaks the electrical components of the carrier assembly (130) may not be live.

A flashlight is operable by a power source. The flashlight includes a body having a first end and a second end. The body is configured to support the power source. The flashlight also includes a first light source positioned adjacent the first end. The first light source is electrically coupled to the power source and fixed relative to the body. The flashlight further includes a second light source coupled to the body. The second light source is movable relative to the first light source about a hinge defining a pivot axis.

A high-diffusion-coefficient and high-brightness light source generation device comprising: a light source module, an optical fiber bundle and an optical fiber hemisphere emitter, wherein the light source module provides the optical fiber bundle with a plane light source having the same size as an end surface of an incident end thereof, the incident end receives light emitted from the light source module, exit ends transmit the light to the optical fiber hemisphere emitter, the exit ends of the optical fiber bundle arranged on a hemispherical wall of the optical fiber hemisphere emitter in an equal solid angle manner, an end surface of each optical fiber exit end located on the same surface as the inner wall of a hemisphere, a bottom plate arranged above an opening of the optical fiber hemisphere emitter, and an opal glass window arranged at the circle center position of the bottom plate.

A lighting apparatus comprises the following elements. A first set of light emitting diode module includes a variety of light emitting diode elements, wherein different types of light emitting diode elements have different color temperature characteristics. A driving circuit supplies power to the first set of light emitting diode module, such that the plurality of light emitting diode elements emit light. Moreover, the driving circuit may supply currents with different total values, and the optical characteristics of the first set of light emitting diode module change accordingly, so as to change color temperatures.

A light fixture includes a fixture body, a support structure, a plurality of light emitting diodes (LEDs) a driver, a cover, and a connector. The fixture body includes a first raceway, a second raceway, and a channel. The second raceway is substantially parallel to the first raceway. The channel is coupled to the first raceway and the second raceway such that the channel is substantially orthogonal to the first raceway and the second raceway. The support structure is coupled to the first raceway and the second raceway. The plurality of LEDs is coupled to the support structure and spaced apart along a length of the support structure between the first raceway and the second raceway. The driver is positioned within the channel and electrically coupled to the plurality of LEDs. The cover is detachably coupled to the channel and extends from the first raceway to the second raceway.

A luminaire includes a body including a lighting compartment and a bezel rim around at least a portion of a perimeter of the body. The luminaire also includes clamping plates that extend a length of the luminaire. As the clamping plates are secured in a lighting compartment of the luminaire, they provide a clamping force to secure an LED circuit board in the lighting compartment. A base of the lighting compartment may also serve as a heatsink for the LED circuit board. A low-profile luminaire according to such features is also provided.

A lighting device comprises at least two groups of light-emitting diodes and an electronic circuit for controlling said light-emitting diodes. The electronic circuit is configured to control each group of light-emitting diodes separately. The beam characteristic of at least one of the groups of light-emitting diodes differs from the beam characteristic of at least one of the other groups of light-emitting diodes. As a result, the light distribution of the lighting device can be switched electronically.

A modular lighting assembly includes two modular segments, each having a frame member. A coupler for forming an assembly, and an assembly formed by the coupler. In one example implementation, two members having abutment faces are drawn together using a coupler. Each of the members has a T having a T-shaped cross section, and the coupler has channel with a T-shaped cross section. The channel receives the ends of the rails. Each rail has an opening in its top face. Two screws are threaded into a back of the coupler and angled toward a center of the coupler, such that the ends of the screws engage sidewalls of the openings in the rails. As the screws are advanced into the coupler body, the ends of the screws are drawn together, drawing together the abutment faces of the two members. In other implementations, other rail and channel shapes may be used.

An illuminating device coupled with sensors or an image acquisition device and a logical controller allows illumination intensity and spectrum to be varied according to changing user needs. The system provides illumination to areas according to the principles of correct lighting practice for the optimal performance of visual tasks in the most efficient, cost effective manner. Aspects of the invention include: lighting fixtures which adapt to ambient lighting, movement, visual tasks being performed, and environmental and personal conditions affecting illumination requirements at any given instant. Lighting fixtures having spatial distribution of spectrum and intensity, providing both background room lighting, and task lighting.