“In 2016, the world has still much kind of opinions on LEDs applied in artwork lighting. Enhanced colour appearance became almost an evidence for now, but possible effect of light on materials is still an argumentation. Besides basic facts come from physics we still need more “close to reality” investigations. Thanks to the ongoing multidisciplinary research works on LED museum lighting, more and more information is gained on the effects of LED light on historical materials. These results will help us to preserve our cultural heritage”.