Magmatic PSG800 Black Glass UV FilterThe Magmatic Prisma Wash Black Glass UV Filter is part of a line that's available for all Prisma series UV LED lighting products. The black glass filter blocks all visible light allowing only the ultraviolet spectrum to effectively illuminate the UV reactive material and nothing else. By completely blacking out all visible light, the black glass filters allow Prisma fixtures to hide discreetly in themed environments, clubs, glow events, and