ABSTRACT
Avoiding power losses in signage: Tralatitious light sources used in these applications were the incandescent and halogen lamps. e main annoyance with these sources was that they employed light lters to produce signals of dierent colors. Filtering is an energy-wasting process involving the conversion of a broadband spectral distribution into narrowband distribution with the unwished-for wavelengths transformed into heat. erefore, the conventional lamps unnecessarily dissipated energy and called for replacement. As LEDs are narrowband sources, available in almost all colors without ltering, they are unrivaled over incandescent and other lamps in this respect.
