LemonBest High Bright Aquarium LED Light Lamp Fish Tank Lighting Fixture for Aquarium Fish Tank Size: 50*10.5*6cm / 19.7*4.1*2.4" ( Can extend to 70cm/ 27.6" long with the fixture ).High quality SMD LED beads, high brightness. Ultra-thindesign, beautiful and concise. Dedicated power supply design, more energy-efficient.Telescopic rod design, easier to use. NOT waterproof please stay away from water. Turn off the power before cleaning the lamp. The operating voltage must be compatible with the transformer voltage requirements. Lamp should be mounted on the tank. Cannot be put into water. Includes power adapter.