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Solid-state lighting (SSL) is a type oflighting that usessemiconductor light-emitting diodes (LEDs),organic light-emitting diodes (OLED), orpolymer light-emitting diodes (PLED) as sources of illumination rather thanelectrical filaments,plasma (used inarc lamps such asfluorescent lamps), orgas.
Solid state electroluminescence is used in SSL, as opposed to incandescent bulbs (which use thermal radiation) or fluorescent tubes. Compared to incandescent lighting, SSL creates visible light with reduced heat generation and less energy dissipation. Most common "white LEDs” convert blue light from a solid-state device to an (approximate) white light spectrum usingphotoluminescence, the same principle used in conventional fluorescent tubes.
The typically small mass of a solid-state electronic lighting device provides for greater resistance to shock and vibration compared to brittle glass tubes/bulbs and long, thin filament wires. They also eliminate filament evaporation, potentially increasing thelife span of theillumination device.
Solid-state lighting is often used intraffic lights and is also used in modern vehicle lights, street and parking lot lights, train marker lights, building exteriors, remote controls etc.[1] Controlling the light emission of LEDs may be done most effectively by using the principles ofnonimaging optics.[2] Solid-state lighting has made significant advances in industry. In theentertainment lighting industry, standard incandescent tungsten-halogen lamps are being replaced by solid-state lighting fixtures.[3]
