The URI Actinic White lamp is the first of its kind to offer a 50/50 combination of tri-band (daylight) and actinic (blue) phosphors. This mixture provides a great balance between the life supporting spectrums required by live rock, corals, anemones, and related marine life, and the daylight spectrum required for vibrant color rendition. The 180 degree internal reflector allows for 40% more light output. The Actinic White Lamp has a Kelvin temperature of 12,000.

Ultraviolet Resources International was the first to revolutionize the aquarium industry with its introduction of the tri-band phosphor mix and VHO internal reflector lamps. Since that introduction in 1988, URI's aquatic lighting has been the number one choice for premium marine systems all over the world.