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Journal of Light & Visual Environment
Vol. 32 (2008) No. 2 P 208-213



Research Notes

The advantages of LED lighting are discussed. We report experiments where observers graded the quality of several light-emitting diode (LED) illuminations. One experiment is based on color discrimination and two experiments are based on the judgement of appearance. We conclude that clusters with red, green, blue, and/or amber LEDs impair color discrimination, although they seem to locally enhance the color gamut. We also conclude that LED clusters that include white LEDs and a few correcting color LED may render colors faithfully.

Copyright © 2008 The Illuminating Engineering Institute of Japan

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