1.4 LIGHT-EMITTING DIODES
LEDs are small, rugged, and bright light sources with a huge potential to become the dominant light source in the future. Nowadays, LEDs are the most efficient sources of colored light in the visible range of the spectrum. White LEDs already surpassed incandescent lamps in performance and undergo continuous improvement of their efficiency. Today, almost a quarter of the electric energy used is spend for lighting, and perhaps half of this energy could be saved by the employment of efficient and cold solid-state lighting sources [5]. It seems that “Optopia” is on its way and solid-state light sources are at the forefront of the ongoing lighting revolution.
At present, commercially available LEDs cover the spectrum from ...
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