A system for improving an appearance of light from an excimer lamp includes the excimer lamp configured to output excimer light that includes ultraviolet light having an ultraviolet wavelength and visible light having a first visible wavelength or spectra. The system further includes at least one additional light source configured to be packaged with the excimer lamp and to output additional light having a second visible wavelength or spectra. The system further includes a cover that is at least one of transparent or translucent to the ultraviolet wavelength and having a surface pattern that causes the excimer light to blend with the additional light.

A light fixture delivering electrically controlled lighting distributions for mounting within an installed panel system typically used in ceiling and wall constructions and incorporating acoustic, drywall or wood panels. The light fixture can provide low-glare or wide spread “batwing” ambient light or more directional wall wash, task and accent lighting. The light fixture comprises one or more LED boards and an optical element which can be back-lit or edge-lit. The light fixture body is configurable, comprising a 3-dimensional extruded elongate body with its ends cut at a configured angle. The body typically comprises additional side support features that support and enclose the edge of installed panels. In the case of a T-bar based ceiling grid system the side support features may also replicate the function and appearance of T-bar horizontal and vertical portions. The body comprises features to retain and align LED boards, reflectors and a back-lit or edge-lit optical element. In the edge-lit configuration the optical element may also be a light guide. The edge-lit design also enables the height of the lighting assembly body to be equivalent to or less than the height of T-bar main beams or cross tees. This is very important in applications where there is zero or little available plenum space above the ceiling grid. Because the lighting assembly can also provide structural support within the installed panel system it can replace one or more T-bars and can also be used to connect one or more T-bars or other structural grid elements. The lighting fixture can be mounted at an oblique or diagonal angle to the typical square grid layouts, or in a corner of a ceiling grid T-bar cell at the intersection of one or more T-bars. Additionally, more than one elongate bodies can be connected to form square, crosses, curves or arcs or more complex shapes. The electrical power may additionally be configured to control lighting distributions of the fixtures independently of one another.

The present invention relates generally to tessellated bezel light diffusers which act to disperse penumbral light providing more uniform and even illumination. The present invention also relates to luminaires employing an array of light sources with tessellated bezel light diffusers which act to eliminate edge and transition lighting effects providing more uniform and even illumination between LEDs and at the periphery of illuminated zones. The present invention also relates to luminaires employing LED arrays equipped with tessellated bezel light diffusers that provide very uniform illumination zones with more evenly dispersed transitional edge lighting than conventional luminaires.

Apparatus and methods for producing narrow-band radiation in the green region of the visible spectrum are described. The narrow-band radiation may be used to aid subjects experiencing photophobia. In some cases, subjects may experience a reduction in pain (e.g., migraine photophobia) when using the narrow-band radiation.

The present disclosure is directed to a sun-sky-imitating illumination device (100) for generating natural light similar to that from the sun and the sky, comprising a direct-light generator (10) that comprises a first emitting surface (11) from which a direct light (13) is emitted and a collimated light source (20) configured to generate from a primary light a collimated light (23) which exits an output surface (22) positioned upstream from the first emitting surface (11) with respect to a direct light direction (15), wherein the direct light (13) has a luminance profile (Ldirect(x, y, θ, φ)) which has a first peak in the angular distribution around the direct-light direction (15) and the collimated light (23) exiting the output surface (22) has a luminance profile (Lcoll(x, y, θ, φ)) which has a second peak (14) in the angular distribution around the direct-light direction (15), the second peak being a narrow peak, and a diffused-light generator (50) that is at least partially light-transparent and is positioned downstream of the direct-light generator (10) and comprises a second emitting surface (51) and is configured to cause diffused light (53) at the second emitting surface (51), wherein the sun-sky-imitating illumination device is configured such that the direct-light generator (10) and the diffused-light generator (50) co-operate to form outer light (53,54) at the second emitting surface (51) which comprises a first light component (54) which propagates along directions contained within the narrow peak (14) and a second light component (53) which propagates along directions spaced apart from the narrow peak (14), wherein the first light component (54) has a CCT which is lower than a CCT of the second light component (53), wherein the direct-light generator (10) comprises an optical unit (30) positioned downstream of the output surface (22) of the collimated light source (20) and upstream from the first emitting surface (11) with respect to the direct light direction (15), wherein the optical unit (30) is configured to interact with the collimated light (23) exiting the output surface (22) to generate the direct light (13) emitted from the first emitting surface (11) so that the first peak of the luminance profile (Ldirect(x, y, θ, φ)) of the direct light (13) is larger than the second peak of the luminance profile (Lcoll(x, y, θ, φ)) of the collimated light (

Apparatus and methods for enhanced lighting. The apparatus may include a light-transmitting body. The apparatus may include a light projector. The projector may be configured to propagate into the light-transmitting body an incoming incoherent light. The projector may be configured to propagate into the light-transmitting body an incoming visible coherent light. Emerging coherent light within a visible wavelength rage attributable to the incoming visible coherent light may have a first intensity. The first intensity may be greater than a second intensity. The second intensity may be an intensity of any emerging coherent light that is within the wavelength range and is attributable to the incoming incoherent light. Emerging light may be light that emerges from the light-transmitting body.

The present invention relates to a color tunable and/or color temperature tunable LED filament (20, 22, 24), said LED filament comprising an elongated carrier (220), said elongated carrier comprising a first major surface (222) and a second major surface (224) arranged opposite to said first major surface, a plurality of LEDs (210) arranged in at least one linear array on said first surface of said elongated carrier, wherein the plurality of LEDs includes LEDs of different colors and/or different color temperatures, a first elongated transparent or substantially transparent layer (230) covering the plurality of LEDs on the first major surface and also at least partly covering said first major surface, and a first elongated light scattering layer (240), arranged to at least partially cover said first transparent or substantially transparent layer.

A lighting apparatus includes a light source, a light passing cover, a back cover and a rim frame. The light source is used for emitting a light. The light passing cover has a first ladder edge. The rim frame has an inner frame and a light source holder. The back cover, the surface rim and the light passing cover define a concealed space. The light source is disposed in the light source holder in the concealed space. The inner frame defines a light opening for the light to escape from the lighting apparatus. The inner frame has a second ladder edge surrounding the light opening. The first ladder edge and the second ladder edge are pressed by the back cover to press to each other. Multiple ladder protrusion surfaces between the first ladder edge and the second ladder edge prevent water to enter the concealed space.

A light-transmitting assembly of a display device, a signal indicator, and the display device are provided in the embodiments of the present disclosure. The light-transmitting assembly of the display device includes: a light-transmitting adjustment member including a plurality of first patterns, a light transmittance of each first pattern is less than a light transmittance of a region of the light-transmitting adjustment member other than the first pattern, and each light-shielding area ratio of the first patterns is a ratio of a sum of areas of all the first patterns in any one region of the light-transmitting adjustment member to an area of the any one region.

Light emitting diode (LED) light tubes having rotatable end cap assemblies are described. The LED light tubes include a hollow tube and a circuit board with LED chips thereon. The end cap assemblies are provided on either end of the tube. Each end cap assembly includes a socket cap, a plug having a plug body and at least one connector, and an end cap body, one end of which engages one of the ends of the hollow tube. A cam locking mount that is positioned within the plug body and on the opposite side has projections to be positioned in the bore of the end cap body. A rotation cam is seated in the cam locking mount and provides for controlled rotation of the LED tube relative to the end caps. Methods of installing the LED light tubes in new installations and retrofit installations and for use in sign assemblies are also described.