ProDeals&reg; Energy Saving LED Fish Tank Aquarium Bar Stick Strip Waterproof Submersible Light Lamp LED Aquarium Light Bar Strip for Aquarium Fish Tank Flood Lights All RGB colors fade out & fade in every 2-4 seconds, very slow and smooth color changing Utilizes low wattage LED lamps, comes with a low voltage transformer. Self-weighted, easy to assemble and install Produces a impressive RGB colors air curtain he light could be submerged entirely under the water or put it out of the water and two suckers help to fix strong in the tank. Fully waterproof, energy saving, long life, low fever