Board Thread:Role-Play and AMA/@comment-860254-20141030113124/@comment-860254-20141030123323

Hamclub13 wrote: how can black light exist Black lights emit large amount of ultraviolet light, and very little light that can bee seen by the naked eye. As such, it can illuminate certain items. White clothing becomes purple, and so on. Bug Zappers usually use these black lights in their creation.

They are made like normal light bulbs, except that they use a phosphor that emits UVA light instead of white light.