Feature: 1.High Degree Waterproof.  2.Low power for transformers, High-power line.  3.Good hyperchromic effect, make your fish and aquarium very colourful.  4.Super light beads: High light bead, close to the sun ultraviolet light color.  5.Fixed quality rubber suction cups, easy to install with aquarium LED light bar.  6.Plug-in transformer: Long service life, Ultra energy saving and environmental product.  7.Explosion-proof ultra-transparent glass: High transparency transmittance safe and dependable.  8.Entirely sealed design, safe to use in underwater.  9.LED lighting will not only increase the color of fish and algae but also make your tank or aquarium more beautiful.     Specification: Wattage: 4W.  Voltage: 220V.  Length: 40cm.  LED Quantity: 36.  Frequency: 50-60Hz.  LED Type: 2835SMD.  Power Cable Length: 108cm.  Color: White, Blue+White, RGB.  Package Includes: 1x LED Light Bar.     Note: If you want.  2.5W 20CM, please click here SKU347130.  3W 30CM, please click here    SKU347147.  5W 50CM, please click here    SKU347164.