A perforated acoustic panel for mounting to a wall and/or a ceiling, including a visible front side and a rear side hidden by the panel when mounted is discussed. It is an objective of the disclosure to provide illuminating walls or ceilings. The objective is solved by a flexible printed circuit layer, FPC, attached to the rear side of the panel, the FPC comprising a plurality of LEDs, wherein each LED is arranged to be positioned to emit light through a perforation of the panel.

A planar illumination device of an embodiment includes a substrate, a first optical element, and a second optical element. A plurality of light sources are two dimensionally disposed at the substrate. The first optical element is disposed at an emission side of the plurality of light sources, and condenses light emitted from the plurality of light sources. The second optical element inclines a light distribution of the light condensed by the first optical element with respect to the first axial direction.

An ambient light bar includes: a printed circuit board (PCB) board; at least one beveled light emitting diode (LED) bead group and a lens assembly. The beveled LED bead group includes at least two beveled LED beads, and the at least two beveled LED beads are fixed on the PCB board according to a preset arrangement. A bevel angle is formed between a chip mounting face and a welding plane of each of the beveled LED beads, and the bevel angles of the at least two beveled LED beads are different. The lens assembly is covered above a light output side of the beveled LED bead group and is fixed on the PCB board.

A lighting unit for illuminating a habitat is provided. The lighting unit includes a housing and a light emitter. The operating parameters of the lighting unit may be adjusted to mimic different natural conditions.

Light-emitting diode (LED) devices and more particularly lens arrays in LED packages are disclosed. Lens arrays include one or more lens shapes positioned to receive light from LED chip arrays. Individual lenses of lens arrays may be separately formed in LED packages on various surfaces, such as on top surfaces of encapsulant layers that cover LED chip arrays. Shapes of individual lenses may be tailored to provide various emission patterns. Exemplary lens arrays in LED packages include all lenses of a same shape or variably shaped lenses within a same lens array. Differently shaped lenses may be arranged over LED chips of a same serially connected string so that emission patterns and/or colors may be dynamically adjusted during operation.

A light source device includes: a plurality of light emitting parts, each having an upper surface that includes a light emitting surface; an optical lens located above the light emitting surfaces of the light emitting parts, the optical lens having: a first surface including a first incident region, and a second surface including a second incident region; and a light converging member located between the light emitting parts and the optical lens, the light converging member including: a light entering portion, corresponding to a first of the plurality of light emitting parts and covering the light emitting surface of the first light emitting part, and a light emission portion, corresponding to the light entering portion. The light converging member includes a first light-reflective member and a unit light converging portion having the light entering portion and the light emission portion.