Methods and apparatus for providing circadian-friendly LED light sources are disclosed. A light source is formed to include a first LED emission (e.g., one or more LEDs emitting a first spectrum) and a second LED emission (e.g., one or more LEDs emitting a second spectrum) wherein the first and second LED emissions are combined in a first ratio and in a second ratio such that while changing from the first ratio to the second ratio the relative circadian stimulation is varied while maintaining a color rendering index above 80.

A lighting device includes a light emitting diode (LED) structure having LEDs, a housing, and a power supply. The housing receives and secures the LED structure, and includes a body portion that comprises a heat sink for the LED structure, and a shroud that at least partially shields the LED structure. The heat sink comprises various fins that extend away from the LED module in a direction that is perpendicular to a width of the LED structure.

A high beam and a low beam is disclosed, the headlight including: a first light source unit; a second light source unit; a first light output unit; a second light output unit; and a controller configured to adjust a light quantity irradiated from the light source in response to a low beam mode or a high beam mode, and to control a beam output of the first light output unit and the second light output unit by allowing the first optical unit to be arranged selectively on a light path between the light source unit and the second optical unit.

A sensor system includes a first sensor, a second sensor, a cover, and a control device. The first sensor detects, with first light, a state of a first area located outside a vehicle and outputs first detecting information corresponding to the state. The second sensor detects, with second light, a state of a second area located outside the vehicle and at least partially overlapping with the first area, and outputs second detecting information corresponding to the state. The cover covers at least one of the first and second sensors while forming a part of an outer face of the vehicle and allows passage of at least one of the first and second light. The control device detects an abnormality of the cover based on an inconsistency between the first and second detecting information that are outputted for an area where the first area and the second area overlap.

The present invention relates to a LED lamp unit replacing an H4 bulb in a headlamp. The LED lamp unit (2) at least comprises two LED light sources (5) arranged on two opposing sides of a support member (11) to emit in opposed half-spaces, a heat sink (12, 3) and an electrical connector socket. The electrical connector socket is designed to fit in a lamp holder of a H4 headlamp such that the plane (6) separating the opposed half-spaces is tilted around the optical axis (7) of the headlamp by an angle of between 5 and 30 against the horizontal plane when the connector socket is mounted in the lamp holder. The proposed LED lamp unit replaces H4 bulbs in H4 headlamps and achieves the required legal beam pattern without changing the optical design of the headlamp.

An LED optical light engine spotlight which can accommodate a variable number of light-emitting diodes (LEDs) is disclosed. An optical projection lens mounted in front of the LEDs merges the separate LED beams into a single beam, similar to the single beam provided by a halogen light and reflector. A heat sink provides convection cooling up to approximately 100 F. An optional fan provides additional heat dissipation for more extreme conditions. The depicted device can include a vertical tilt of over 200. Optimally, the depicted device is designed to have a full vertical tilt range between zenith (0 degrees) to horizontal (90 degrees) to full depression (135 degrees). An optional accessory lens provides additional capabilities, including flood lenses, colored lenses and rock guards, for example. The depicted device can be hard wired or wireless. The depicted device can be adapted to many base units and/or pan and tilt platforms.

A reversible mounting flange capable of being mounted in one of a plurality of configurations and operable to secure any of a plurality of different lenses and related components to a mounting surface in any of a plurality of different positions.

The invention relates to a LED vehicle headlight. Each light unit has a LED board with a luminous surface and an optical device associated with a reflector and/or a lens. A reflector holder carries the optical devices of the light units and is formed in one piece with the latter. A board holder is fastened detachably to the reflector holder. The board holder has a receptacle for each light unit, and the LED board has contact surfaces that come into contact with corresponding contact surfaces on the reflector holder to position the LED board with respect to the assigned optical device when the board holder is fixed on the reflector holder. Each light unit has elastic pressurizing means that act on the LED board in order to press its contact surfaces against the contact surfaces of the reflector holder when the board holder is fixed on the reflector holder.

An illumination apparatus includes a light-emitting element, a first lens, and a second lens. A first incident surface of the first lens faces the light-emitting element, and guides a light beam from the light-emitting element to a radiation port. A second incident surface of the first lens guides a light beam not passing through the first incident surface to a direction toward the outer periphery of the first lens. A first reflection surface of the first lens reflects a light beam from the second incident surface to guide the light beam to the radiation port.

The invention relates to a headlight lens for a vehicle headlight for a motor vehicle headlight wherein the headlight lens includes a optionally press-molded body of transparent material, including at least one light entry face and at least one optically effective light exit face, wherein the particularly monolithic body comprises a light tunnel which, via a bend, forms a transition into a light passage section for imaging the bend as a bright-dark-boundary.