The Coralife Aqualight T5 aquarium lighting fixtures are recommended for use with fish only tanks.Features:One 28 Watt 10K T5 fluorescent lamp46.25"L x 2.25"W x 1"H One On/off switch and built-in ballastSleek black aluminum housingHighly-polished reflectorAcrylic lens coverAdjustable width tank mounts (legs to lift the light off the tank)Recommended Accessories:To keep the light cycle consistent, we highly recommend using a timerReplacement Parts:We carry all the replacement lamps for the Coralife Aqualight T5 fixtures