Glo Sun-Glo T8 Fluorescent Aquarium Bulb, 30-Watt, 36-Inch The Sun-Glo T8 is a linear fluorescent 30-watt and 2,200 lumen aquarium bulb This normal output bulb with a color temperature of 4200K fits all suitable standard and electronic ballasts This fluorescent bulb generates a natural looking daylight spectrum with a refreshing natural white light for a balanced and natural look to any aquarium Measures 36-inch length This product weighs 0.46-pound