Glo Power-Glo T8 Fluorescent Aquarium Bulb, 30-Watt, 36-Inch The Power-Glo T8 is a linear fluorescent 30-watt and 1,330 lumen aquarium bulb This normal output bulb with a color temperature of 18000K fits all suitable standard and electronic ballasts This fluorescent bulb generates super bright light with a strong blue spectral component adding to the vibrant white and bluish illumination Measures 36-inch length This product weighs 0.47-pound