<h2>Zoo Med Laboratories - Coral Actinic Flo Bulb 18"</h2><p>Coral Sun is a high intensity actinic lamp with strong emissions in the short wavelength region of the spectrum, peaking at 420nm&#046; It promotes growth of zooxanthellae algae, essential for the growth and well being of all photosynthetic corals and invertebrates&#046; This bulb simulates the short wavelength blue light which penetrates to reef depth in nature&#046; Output closely matches the absorption peak of chlorophyll used in photosynthesis&#046; Ideal for all marine aquariums or reef tanks&#046; Zoo Med&#039;s line of fluorescent aquarium lamps are made in Europe for ultra high quality, color, and longer burn life&#046; Our energy saving T&#045;8 sizes can save you up to 30&#046;00 per year in electricity over the thicker T&#045;12 size lamps&#033; Effective up to 10,000 hours&#046;</p><ul><li>15 Watt</li><li>18 in </li></ul>