Reflector lamps having vitreous, light transmissive reflectors and containing a source of visible and UV light radiation produce little or no UV radiation in the projected light beam by having a light reflecting coating on the exterior surface of the reflector and the reflector made of UV absorbing glass...http://www.google.com/patents/US5353210?utm_source=gb-gplus-sharePatent US5353210 - Reflector lamp with low UV emission
