Are light conditions in your classroom less than ideal for your students to observe fish? These full hoods feature dual-bulb capacity and a Mylar® reflector to aid in light distribution. In addition, the front panel of the hood lifts easily for feeding access. We recommend using two bulbs for the 15 to 20-gallon hood, and two bulbs for the 30-gallon tank hood. The 55-gallon tank hood uses a single 122cm long bulb. Operates on 120 VAC. Bulbs are included.