Abstract: A lighting device (100, 300, 400) is disclosed. The lighting device comprises a light source (110, 310, 410), an at least partially light transmitting envelope (120, 320, 420) and a dispenser (140, 340, 440). The envelope is arranged to define a sealed space (130, 330, 430) in which at least a portion of the light source is arranged. Further, the dispenser comprises a chemically reactive substance and is adapted to gradually release at least some of the chemically reactive substance to the sealed space so as to reduce contaminants and by-products that may be present in the sealed space.

Abstract: The invention provides a lighting unit (10) comprising (a) a lighting device (100), (b) a support (200), and (c) an envelope (300), wherein: —the lighting device (100) is configured to provide lighting device light (101); wherein the lighting device (100) comprises a light source (110); —the support (200) is configured to support the light source (110); wherein the 5 support (200) comprises a laminate of layers, wherein the laminate of layers comprises an electrically conductive first layer, an electrically non-conducive second layer), and a third layer, wherein the first layer comprises copper, wherein the second layer comprises an epoxy-based material, and wherein the third layer comprises an oxygen barrier material; —the envelope (300) is configured to provide a sealed space (310) enclosing the 10 light source (110) and at least part of the support (200); wherein the envelope (300) comprises an envelope part (320) transmissive for the lighting device light (101), and wherein the sealed space (310) comprise

Abstract: A lighting device (100, 300, 400) is disclosed. The lighting device comprises a light source (110, 310, 410), an at least partially light transmitting envelope (120, 320, 420) and a dispenser (140, 340, 440). The envelope is arranged to define a sealed space (130, 330, 430) in which at least a portion of the light source is arranged. Further, the dispenser comprises a chemically reactive substance and is adapted to gradually release at least some of the chemically reactive substance to the sealed space so as to reduce contaminants and by-products that may be present in the sealed space.

Abstract: The invention relates to a lighting device (1) comprising an envelope (2), a base (3), a solid-state light source (4) and optical means (5) provided with a light-outcoupling surface, the solid-state light source (4) being optically coupled to said optical means (5). The use of a spirally wound optical fiber as optical means (5) and a transparent envelope (2) shaped as a conventional light bulb provides a lighting device (1) which is a good look -alike of the conventional incandescent lamp, such as, for instance, the carbon filament lamp. The long lifetime and high efficiency of LEDs as a solid-state light source (4) will make this lighting device (1) a very attractive alternative for the conventional incandescent lamp. The lighting device (1) according to the present invention has the further advantage that a large gamut of colors can be chosen and adjusted by using, for instance, red green and blue LEDs in said lighting device (1).

Abstract: The invention relates to a lighting device (1) comprising an envelope (2), a base (3), a solid-state light source (4) and optical means (5) provided with a light-outcoupling surface, the solid-state light source (4) being optically coupled to said optical means (5). The use of a spirally wound optical fiber as optical means (5) and a transparant envelope (2) shaped as a conventional light bulb provides a lighting device (1) which is a good look-alike of the conventional incandescent lamp, such as, for instance, the carbon filament lamp. The long lifetime and high efficiency of LEDs as a solid-state light source (4) will make this lighting device (1) a very attractive alternative for the conventional incandescent lamp. The lighting device (1) according to the present invention has the further advantage that a large gamut of colors can be chosen and adjusted by using, for instance, red green and blue LEDs in said lighting device (1).

Abstract: The invention relates to a lighting device (1) comprising an envelope (2), a base (3), a solid-state light source (4) and optical means (5) provided with a light-outcoupling surface, the solid-state light source (4) being optically coupled to said optical means (5). The use of a spirally wound optical fiber as optical means (5) and a transparant envelope (2) shaped as a conventional light bulb provides a lighting device (1) which is a good look-alike of the conventional incandescent lamp, such as, for instance, the carbon filament lamp. The long life-time and high efficiency of LEDs as a solid-state light source (4) will make this lighting device (1) a very attractive alternative for the conventional incandescent lamp. The lighting device (1) according to the present invention has the further advantage that a large gamut of colors can be chosen and adjusted by using, for instance, red green and blue LEDs in said lighting device (1).

Abstract: The invention relates to a lighting device (1) comprising an envelope (2), a base (3), a solid-state light source (4) and optical means (5) provided with a light-outcoupling surface, the solid-state light source (4) being optically coupled to said optical means (5). The use of a spirally wound optical fiber as optical means (5) and a transparent envelope (2) shaped as a conventional light bulb provides a lighting device (1) which is a good look-alike of the conventional incandescent lamp, such as, for instance, the carbon filament lamp. The long life-time and high efficiency of LEDs as a solid-state light-source (4) will make this lighting device (1) a very attractive alternative for the conventional incandescent lamp. The lighting device (1) according to the present invention has the further advantage that a large gamut of colors can be chosen and adjusted by using, for instance, red green and blue LEDs in said lighting device (1).