Coralife 30 inch Actinic 03 (420nm) 18 Watt T5 Fluorescent Lamp
Actinic lamps emulate the softer shades of blue light found at dawn, dusk, and in deeper water. With a spectral peak at 420 nanometers, actinic lamps promote photosynthesis and cause corals to fluoresce in beautiful glowing colors. For use with saltwater and coral reef aquariums.