The Current USA Serene Background RGB Light Replacement 48" (5153) is a completely waterproof RGB LED strip designed to illuminate the background of your saltwater aquarium. This essential component of the Serene Background system allows you to create stunning visual depth and ambiance by casting and reflecting light exactly where you want it behind your tank. It serves as a direct replacement for an existing light or an expansion to your current setup. Featuring a durable round acrylic tube, this light can be swiveled and adjusted for optimal light direction and effect. Installation is flexible, allowing attachment to your aquarium's plastic frame or directly to your cabinet. The USB plug ensures easy connection to a Serene Background controller or Serene IR controller, which is sold separately. Specifically, the 48" model (5153) measures 45 inches in length and 1 inch in diameter, contains 16 RGB LEDs, and has a maximum power consumption of 34 watts, fitting aquariums from 48 to 60 inches. This replacement RGB light is ideal for reef aquarists who already utilize the Current USA Serene Background system and require a new or additional light for their 48-60 inch aquarium. It provides a simple solution to maintain or enhance the dynamic, customizable background effects that dramatically improve the visual appeal of any reef tank, offering a vibrant backdrop that complements your corals and fish.