Glo Aqua-Glo T8 Fluorescent Aquarium Bulb, 30-Watt, 36-Inch The Aqua-Glo T8 is a linear fluorescent 30-watt and 900 lumen aquarium bulb This normal output bulb with a color temperature of 18000K fits all suitable standard and electronic ballasts Generates an ideal fish color-enhancing spectrum and delivers a strong photosynthetic range of light very capable of stimulating vigorous plant growth Measures 36-inch length This product weighs 0.40-pound