The Coralife Aqualight T5 aquarium lighting fixtures are recommended for use with fish only tanks.Features:One 28 watt 10K and one 28 watt True Actinic 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