UV Lighting Co. was the first to revolutionize the Aquarium industry with its introduction of the triband phosphor mix and VHO internal reflector lamps. Since that introduction in 1988, UVL's aquatic lighting has been the number one choice for professional marine systems all over the world. Now UV Lighting PC-R Lamps have arrived with the same quality phosphors as their VHO counterparts, as well as EXCLUSIVE 180° SILVER OXIDE BUILT-IN REFLECTOR.