A method and device for variable-beam illumination are disclosed. The device has a light source, a first reflector segment, and a second reflector segment. The first segment has a first parabolic cross section to produce a first light distribution having a wide-angle light distribution. The second segment has a second parabolic cross section to produce a second light distribution that is narrower than the first light distribution. At least one of the first and second segments is movable between first and second positions. At least a portion of the light is reflected to effectuate the first light distribution when the at least one of the first and second segments is in the first position. At least a portion of the light is reflected to effectuate the second light distribution when the at least one of the first and second segments is in the second position.

A luminaire includes a surface light source that emits light with a plane, effective emission surface E, from which the light generated in the surface light source is radiated, a reflector configured to suppress glare of the surface light source for emission angles above a glare angle a, with 40a80, and a plane, effective radiation surface F, from which light emitted by the surface light source emerges from the luminaire, wherein the emission surface is surrounded on all sides by the reflector and the reflector, starting from the emission surface, extends towards the radiation surface, the reflector, in a cross-sectional view perpendicular to the emission surface, is formed concave on average so that a width b of the reflector in a direction away from the emission surface is described by a function f (b) and the first derivative f (b) thereof increases either strictly monotonically or as an alternative monotonically as well as strictly monotonically in some places in the direction away from the emission surface, it applies with a tolerance of 5% at most: F=E/sin.sup.2(a) with E1 cm.sup.2, on at least one intersection line parallel to and in the emission surface, it applies for a height H of the reflector in the direction perpendicular to the emission surface with a tolerance of 10% at most: H=tan(90a) L, and L is a length of the intersection line from an edge of the emission surface facing away from the reflector to the edge of the facing radiation surface, in a plan view.

The present application discloses a unitary gasket-reflector for use in light sources having at least one reflector and at least one gasket to seal the inside of the light sources against the elements.

Apparatus and methods for lighting are provided. The apparatus may include a lighting assembly. The lighting assembly may include a radius. The lighting assembly may include a light-emitting diode (LED) light source. The LED light source may include an LED. The apparatus may include a heat sink. The heat sink may be configured to retain the lighting assembly. The lighting assembly may be configured to emit light from an aperture. The aperture may be included in a structure. The aperture may include a radius. The lighting assembly may be configured to tilt relative to the structure. The lighting assembly may be tilted by insertion of an item through the aperture. The difference between the lighting assembly radius and the aperture radius may be between 0.075 inches and 0.25 inches.

Apparatus and methods for lighting. The apparatus may include a removable recess lighting assembly. The lighting assembly may include a light-emitting diode (LED) light source. The LED light source may include an LED. The lighting assembly may define a central axis. The apparatus may include a heat sink. The heat sink may be configured to be mounted in a structure. The heat sink may be configured to retain the lighting assembly. The heat sink may be configured to release the lighting assembly in response to a translation of the lighting assembly along the central axis. The translation may be a translation without a rotation of the light assembly about the central axis. In operation, the lighting assembly may be serviced without causing damage to the structure in which the apparatus is mounted. The lighting assembly may be removed through a defined aperture in the apparatus.

The present disclosure describes light systems in which the intensity of base color LEDs configured to emit light within a target color region is increased using additional white LEDs and the emitted light is filtered so that a dominant portion of light passing through the filter at a particular viewing angle is within the target color region. The present disclosure also describes methods for forming a printed circuit board with an integral heat sink arrangement by depositing additional solder on solder pads that are not used to connect electronic components so that the additional solder acts as a heat sink.

A LED luminaire (100, 200, 300, 400, 500) is provided. The LED luminaire (100, 200, 300, 400, 500) comprises a LED light source (102) arranged to emit light into a light guide (104), the light guide (104) is arranged to guide the light from the LED light source (102) to a light out-coupling element (106). A reflector (108) forms a partly enclosed space (110) and comprises a slot (112), wherein the light guide (104) extends through the slot (112), the light out-coupling element (106) is arranged in the partly enclosed space (110) of the reflector (108), and the LED light source (102) is arranged outside the partly enclosed space (110) of the reflector (108) wherein the reflector (108) is arranged such that light exiting the reflector (108) has an angle different from zero with respect to a propagation direction of light in the light guide (104). This provides for a compact LED luminaire.

A device has a light source, a first reflector segment having a first parabolic cross section to produce a first light distribution having a wide-angle light distribution, and a second reflector segment having a second parabolic cross section to produce a second light distribution that is narrower than the first light distribution. At least one of the first and second segments is movable between first and second positions such that a portion of the light emitted by the light source is reflected to form the first light distribution when the at least one of the first and second segments is in the first position, and a portion of the light is reflected to form the second light distribution when the at least one of the first and second segments is in the second position.

A lighting apparatus includes a first body including a first inner circumferential surface and a first outer circumferential surface, a cover disposed on and fastened to the first body and including an open bottom surface, an optical member disposed between the first body and the cover and exposed at the open bottom surface of the cover, and a light source member including a circuit board disposed between the cover and the optical member along an edge of the cover and at least two light sources mounted on the circuit board to face each other.

An illumination device includes a light source unit and a light guide plate configured to guide light coming from the light source unit. The light guide plate includes an incidence surface, main emission surfaces from which the light incident on the incidence surface is emitted, and an end emission surface which is opposed to the incidence surface and from which the light is emitted. At least one of the main emission surfaces has a stepped surface which is formed such that the thickness of the light guide plate becomes thinner at a side of the end emission surface than at a side of the incidence surface. The stepped surface is configured to reflect the light in a direction opposite to a light guide direction extending from the incidence surface toward the end emission surface and inclined with respect to the light guide direction.