GloFish Light Sticks use a combination of white and blue LEDs to turn any aquarium into a GloFish aquarium. The blue only mode gives GloFish fluorescent fish and GloFish dÈcor an exciting and uniquely fluorescent look. The white and blue mode gives both GloFish and other tropical fish a vibrant look. These waterproof lights attach to the inside edge of the aquarium frame to provide primary lighting to an aquarium, or to add additional lighting to an aquarium. Set includes: One 6in blue & white LED stick, frame clip, two cord routing clips, light switch & a low voltage transformer.