The invention relates to a surface area light (10), in particular for use in a piece of clothing (30). The surface area light (10) according to the invention has a cover layer (11) having a light emission area (12). A reflection layer (13) having a reflection area (14) is arranged on the side opposite the cover layer (11). A first scattering layer (15) made of a textile material, preferably a textile fabric, directly adjoins the cover layer (11). The textile fabric can be connected to the cover layer in a laminar manner or can be in contact thereto. Light sources (16) are arranged at a distance from each other in a longitudinal direction L in one or more rows. The light sources (16) have a light emission side (17) which faces the reflection layer (13). A spacer means (19) secures a minimum distance between the light sources (16) and the reflection layer (13). The light emitted from the light sources (16) is reflected on the reflection layer (13) to the cover layer (11). The optical path within the surface area light (10) can thus be enlarged without enlarging the thickness of the surface area light (10) at a right angle to the light emission area (12).

A thin light-transmitting substrate showing high thermal conduction efficiency, and having a function of raising surface temperature thereof is provided.

The light-transmitting substrate of the present invention comprises a substrate that transmits at least a light of a predetermined wavelength, and a conductor pattern that is disposed on the substrate, and generates heat to raise temperature of the surface of the substrate when it is supplied with an electric current. The conductor pattern is directly disposed on the substrate without any adhesive layer.

The present disclosure is directed to a lighting retro-fit assembly including a panel configured for the passage of light therethrough, at least one light emitting diode (LED) secured to the panel, a driver electrically connected to the at least one LED, and an extendible suspension device, where the extendible suspension device permits mechanical connection of the panel to an existing lighting structure while enabling access to the driver.

An LED filament includes LED chips, two conductive electrodes, conductive wires, an enclosure coating, and one or more auxiliary piece. The LED chips are arranged in an array and electrically connected with one another. The two conductive electrodes are corresponding to the array. Each of the two conductive electrodes is electrically connected to a corresponding LED chip at an end of the array. The conductive wires electrically connect the LED chips and the two conductive electrodes. The conductive wires are respectively between every two adjacent LED chips of the array and between each of the two conductive electrodes and the corresponding LED chip at an end of the array. The enclosure coating is on two or more sides of the array and the two conductive electrodes. A portion of each of the two conductive electrodes is exposed from the enclosure. The auxiliary piece is disposed in the enclosure coating and overlaps one of the conductive wires between each of the two conductive electrodes and the corresponding one of the two LED chips respectively at two ends of the array on a radial direction of the LED filament.

The invention relates to a set (1) of panels forming a lighting system, the set comprising a light-emitting panel (2) and a light-reflecting panel (3), each panel having two opposing first sides (4), two opposing second sides (5) and two opposing main surfaces (6). Each panel is suspended from a ceiling (7) with a first side (4) thereof facing the ceiling. The light-emitting panel (2) comprises a light source (11) arranged on a second side (5) thereof. The second side (5) of the light-emitting panel (2) faces a main surface (6) of the light-reflecting panel (3) such that the light source (11) is arranged to illuminate the main surface (6) of the light-reflecting panel (3). The invention also relates to a lighting system including such set of panels and an acoustic panel as such.

A light emitting device including a transparent board elongated in a first direction and having a first surface and an opposite second surface. Light emitting elements are arranged in the first direction on the first surface side of the board. A transparent bulb houses the board and the elements. A base is connected to the bulb, and leads electrically connect the elements to the base. The leads have a first end portion connected to the base, and an opposite second end portion. Conductive members are respectively connected to the second end portions of the leads, and the conductive members are arranged at both side of the elements on the board in the first direction. A first wavelength converting member is provided on the first surface and seals the elements. The first wavelength converting member is elongated in the first direction. The second surface of the board faces the base.

A light emitting device includes a board, light emitting element chips, a wavelength conversion member, a transparent bulb, support leads, and a support base. The board has a first surface and a second surface. The second surface is an opposite side to the first surface. The light emitting element chips are mounted on the first surface side. The wavelength conversion member is formed unitarily with a transparent member. The transparent bulb encloses the board and the light emitting element chips. The support leads secure the light emitting element chips inside the transparent bulb. The support base can be threadedly engaged with a conventional light bulb socket along a socket axis. The wavelength conversion member is provided on a first surface side and a second surface side, and is elongated in a longitudinal direction. The light emitting element chips is aligned along a line that extends in the longitudinal direction.

Device for providing comprising: A panel having rigid layer having a patterned electrical circuit thereon. An array of illuminating units, each unit being formed by at least one rigid element and a portion of the rigid layer; and including: a rigid optical dispersing element, a light source sandwiched within the panel for generating light from electrical energy, and an electrical conductor. The electrical conductor being the primary heat sink for the light source, the light source being primarily cooled via conduction. The electrical conductor and the optical dispersing element being dimensioned and arranged within the unit such that the electrical conductor does not materially impede transmission of light generated by the light source to the outside of the device. The electrical conductor transmitting electrical and thermal energy received from the light source away from the unit.

A lighting device comprising a housing with a light emission window and, opposite thereto, a reflector. A planar light transmissive carrier arranged in between the light emission window and the reflector and comprising, at least on a side facing towards the reflector, a grid of a plurality of light sources. The plurality of light sources comprise a first group of first light sources and a second group of second light sources. Each first light source has a respective first emission orientation in a respective first direction away from the reflector and each second light source has a respective second emission orientation to issue light towards the reflector, which light, after reflection, is redirected into a respective first direction. The lighting device is able to provide accent lighting and/or diffuse lighting issued by light sources arranged on one planar carrier.

A light effect material is used to create a viewing effect visible to a viewer on the opposite side of the light effect material than one or more LEDs which emit light which is dispersed by dispersive elements on the outer surface of the light effect material. A transparent space is used to space the LEDs apart from the dispersive elements of the light effect material and light emitting dies of the LEDs are substantially parallel to the light effect material.