BeamsWork 18"-22" Hi Lumen LED Aquarium Light Fixture 50 33x0.5W Dimensions - 17.00 x 5.00 x 1.00 Brackets add 0.65" in height Includes 33 LEDs 1020 Lumen Super energy efficient .5 watt LEDs 30x 10000K LEDs 3x Actinic 460nm LEDs Uses less than 27 watt 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