Full spectrum bulb characterized by its deep red color section in the 650 - 720 nm range. Deep red spectrum is excellent for bringing out the vibrant reds in an aquarium and enhances the non-fluorescent pigments in corals bringing out the true color of an aquarium. Recommended Use: in combination with at least 3 or more other T5 bulbs. Not recommended as a stand-alone bulb. Warranty: 1 year (Pro-Rated).