Description : ES-AF862 The best of both lighting worlds is possible with Coralife 50/50 Fluorescent Bulbs. These versatile bulbs are a mixture between 10;000K natural daylight and 50% blue actinic 03 phosphors. These full-spectrum lamps enhance color and clarity while providing tank inhabitants with the proper light required for essential biochemical reactions. Corals and invertebrates dependant on photosynthesis will thrive under these lighting conditions! For more information; please read our article on Fluorescent Aquarium Lighting Basics .