BeamsWork 18"-22" Single Bright Power LED Aquarium Light Fixture 300 Dimensions - 17.00 x 5.00 x 1.00 Brackets add 0.65" in height Includes 54 LEDs 300 Lumen Super energy efficient .1 watt LEDs 51x 6500K LEDs 3x Actinic 460nm LEDs Uses 6 watts Slim and contemporary light design 2 mode on / off function for day and night use Extendable bracket - 18"-22" max extend Non-corrosive powder coated aluminum housing Splash guard