Solid-state lighting for illumination and displays: Opportunities and challenges for color excellence

Solid-state light sources are transforming luminaires and information displays, enabling screens to illuminate rooms and luminaires to form images. Maintaining color excellence, from all perspectives, will be challenging for solid-state light sources while creating opportunities. A common assumption is that their primary distinguishing feature is high efficiency. The number of discernable signal levels depends on the kind of optical information being transmitted and is not precisely known, but there are clues that can provide an idea about the efficiency of solid-state light sources.