I'm building a LEGO model and planning on lighting it with a bank of 5 battery operated LEDs. I know sunlight negatively affects several LEGO colors. Will a bright LED harm the elements in my MOC the same way sunlight would?
Ultra-violet radiation is emitted primarily by sunlight, mercury lamps, black lights.
LEDs emitting visible light will not produce a significant amount of UV radiation required to discolour LEGO bricks. However, LEDs can be manufactured to emit UV light,