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.

The collimator comprises an output area approximately having the shape of an n-gon with legs and apices, for collimation of light rays emitted by a light source. In viewing the collimator from the side from the optical source in the direction of the lighting axis, the collimator comprises n first parts and n second parts. Each first part is associated with one of the legs of the n-gon and comprises the first sector of the first circular collimator, approximately inscribed in the n-gon so that this leg is tangential to the outline of the circular output area of the first circular collimator. Each second part is associated with one of the apices and is comprised in a second sector of the second circular collimator, approximately circumscribed around the n-gon so that the outline of the output area of this second circular collimator passes through the apex.

A vehicular lighting apparatus is relatively small, low cost, superior in mountability, and offers a superior design. The vehicular lighting apparatus attachable to a front end of a vehicle includes: a composite lens element that is a light guide element constructed by molding a translucent resin substantially into a plate-like shape; a planar light-emitting unit that emits illumination light; an optical system that transforms planar light from the light-emitting unit into linear light and that causes the linear transformed light to be incident on a rear side face of the light guide element; and a diffraction lens formed on the rear side face of the light guide element on which the linear transformed light is incident, and condensing the linear transformed light. The light condensed by the lens means is emitted from a front side face of the light guide element onto a road surface in front of the vehicle.

A motor vehicle lighting device includes structural elements with a housing, at least one light module accommodated inside the housing, and at least one light source cooperating with an optical surface. The light module is provided with a heat sink, a generator of an air flow, and a single air duct suitable for cooperating with the generator of the air flow such as to direct the generated air flow towards the heat sink of the at least one light module. The air duct is formed by an open part added in the housing, and at least one closing structural element suitable for closing all or part of the added part.

A light module includes at least one light source, a light source support, and an optical element suitable for receiving rays emitted by the light source. The optical element includes structure for positioning the optical element in a predefined position on the support and an elastic attachment device for attaching the optical element in the predefined position on the support.

A lighting device, which may be employed e.g. as a retrofit bulb for vehicle lamps, includes a light radiation source, e.g. a LED source, and a beam-narrowing optical system facing the light radiation source, for propagating a narrowed light radiation beam of the source along a longitudinal axis of the device. Arranged distally of the beam-narrowing optical system along the longitudinal axis, there is provided: a light reflector, a light-driving lens, a filament-like body including annular reflective surfaces extending around the longitudinal axis and exposed to light radiation from the light radiation source propagated through the light reflector and the light-driving lens, a distal mirror member having a reflective surface facing towards the filament-like body, to reflect light radiation towards annular reflective surfaces in the plurality of annular reflective surfaces. The light radiation reflected by the annular reflective surfaces of the filament-like body is spread radially from the longitudinal axis.

A lighting assembly that provides integrated forward projecting light and side lighting to give a user a broader field of light. The assembly also incorporates daytime running lights to increase visibility during the day and night. The lighting assembly includes a cooling system suitable for dissipating the heat generated by light sources and electrical components of the assembly.

A holding arrangement for lenses of a lighting device for vehicles with a number of lenses which are arranged axially spaced from one another and which are enclosed by a surrounding body formed of two half shells firmly connected to one another, wherein the surrounding body has a plastic material, wherein the surrounding body has such an axial length and holder that a light source unit of the lighting device is enclosed in an end region of the surrounding body to form a light module and that the plastic material is filled as a thermoplastic or thermosetting material or as a composite material with at least one thermal expansion-reducing additional material.

Provided are a light emitting device capable of reducing glare, a headlight, and a vehicle including the same.

The light emitting device comprises: a light emitting element having a light emission peak wavelength in a range of 400 nm or more and 490 nm or less; and a wavelength conversion member including a first fluorescent material having a light emission peak wavelength in a range of 480 nm or more and less than 580 nm and a second fluorescent material having a light emission peak wavelength in a range of 580 nm or more and 680 nm or less and having a composition different from that of the first fluorescent material, wherein the light emitting device emits light having a first luminance ratio Ls/L that is 0.9 or less, where Ls/L is a ratio of a first effective radiance Ls of the light emitted by the light emitting device in consideration of a spectral luminous efficiency curve for photopic vision of humans specified by the CIE (Commission Internationale de l'Eclairage) and S-cone spectral sensitivity of humans, to a luminance L of the light emitted by the light emitting device in consideration of the spectral luminous efficiency curve for photopic vision of humans.

A light patterning device and a vehicle lamp including the light patterning device and a motor vehicle are provided. The light patterning device includes: at least one light source arranged to emit a light beam; a first patterning unit arranged to receive and pattern the light beam, the first patterning unit including a plurality of first light deflecting portions; and a second patterning unit arranged to receive and pattern the light beam which has been transmitted through the first patterning unit, the second patterning unit including a plurality of second light deflecting portions, wherein at least one of the first patterning unit and the second patterning unit is movable with respect to the other.