An illumination device includes a plurality of light sources arranged in at least a first group of light sources having one or more light sources and a second group of light sources having one or more light sources and further includes one or more light collectors, each being arranged for collecting light from one or more light sources from the first group of light sources and for converting the collected light into one or more light beams. The first and second groups of light sources are each individually controllable. The first and second groups of light sources are both arranged for emitting light from a space on one side of the one or more light collectors. The illumination device is arranged so that light emitted from the second group of light sources through the one or more light collectors defines a pattern comprising one or more elongated elements.

An LED illumination apparatus according to an exemplary embodiment of the present invention includes a substrate, a light source disposed on the substrate, a cover unit, wherein the cover unit is configured to cover the light source, which is disposed on the substrate, and a reflector which is configured to extend from the cover unit inside to the upper substrate, whereby a light generated by the light source illuminates an area below a bottom side of the substrate.

A lamp is provided in this disclosure, which includes a lamp body, a light-transmissive cover and a light-emitting strip. An inner wall of the lamp body is provided with a step layer, and the light-emitting strip is installed on the step layer. The step layer is composed of a plurality of annular steps, and the plurality of annular steps decrease in size successively. The light-emitting strip is fixed to a step of the step layer, and a light-emitting surface of the light-emitting strip is disposed towards the light-transmissive cover. A new downlight structure is provided in this disclosure.

A lighting device, having: a first light irradiation unit including a first concave reflecting mirror and a first light source provided within the first concave reflecting mirror; and a second light irradiation unit that has a second concave reflecting mirror that is smaller than the first concave reflecting mirror and a second light source provided within the second concave reflecting mirror, the second light irradiation unit being disposed more to the light irradiation direction side than the first light source, and being disposed so that the optical axes of the first concave reflecting mirror and the second concave reflecting mirror are the same.

An illumination system includes an LED-based light source that is elongated along a given direction and has a target length. The LED-based light source includes two or more boards disposed along the given direction, each of the boards corresponding to a stockkeeping unit (SKU) from among a finite number of SKUs. Here, each SKU corresponds to a combination of a pre-specified board length and an LED circuit to be powered using a constant current method. As a value of the target length of the LED-based light source is smaller than a sum of the lengths of the constitutive boards of the LED-based light source, a shortest board from among the constitutive boards is offset, in a direction orthogonal to the given direction, by a finite offset relative to the remaining ones of the constitutive boards.

A flexible and illuminating multilayer structure wherein the flexible and illuminating multilayer structure has at least two flexible foils laminated together. Each foil has a flexible electrically conductive pattern layer and LED units distributed over the foil, the LED units being electrically contacted with the contact pattern. The LED units of a foil are positioned between positions of the LED units of the other foils. At least one foil of the multilayer structure, towards which at least one of the LED units is configured to radiate light, is transparent to the light. Brightness of the LED units is at least foil-specifically controllable with operational electric power fed to the foils through the contact pattern. The LED units of at least one foil are of a different tone or color or are controlled to output a different tone or color than the LED units of at least one other foil.

An improved light assembly includes aligned directional light sources mounted one behind another. A distal one of the light sources occludes light emitted from a proximal one of the light sources. A reflector is interposed between the light sources, with a convex surface facing the proximal one of the light sources. Thus, the light assembly projects a light field extending at least through an 180° hemisphere, and up to about 270° backwards from the forward orientation of the light field, well-illuminating lateral approaches to the assembly.

A folded light engine comprising an array of LEDs mounted on a strip substrate, wherein the strip substrate comprises a central portion provided with a first set of through-holes, a first peripheral portion provided with an electrically conducting track connecting a first group of LEDs and a second set of through holes, and a second peripheral portion provided with an electrically conducting track connecting a second group of LEDs. The first peripheral portion is folded over the central portion, so that the LEDs thereon coincide with through-holes in the central portion, and the second peripheral portion is folded over the first peripheral portion, so that each LEDs thereon coincide with a combined through-hole formed by through-holes in the central portion and in the first peripheral portion. An elongated light engine can be cost efficiently manufactured in a relatively simple processes, including single-sided circuit patterning and LED mounting.

Ceiling illumination is a method by which indirect lighting can be achieved in a space to replace a recessed downlight and to provide better light utilization and application efficiency. A solid-state lighting apparatus is invented which includes a support structure and a substrate for mounting LEDs and configured to emit light in a direction such that, when installed as per the invented method, can illuminate a ceiling and subsequently the space below it.