We bought this lamp to turn up at a Halloween party in the GÃ'steklo blacklight. The lamp fits in a normal version fÃ'r StandartglÃ'hbirnen and also produces true black light. However, it is not quite as bright as I expected hÃ'tte, but still has a nice effect at the fÃ'r GÃ'sten worried. I wÃ'rde buy well again.