Aquatic Life Light T5 HO 4-Lamp 2-Lunar Aquarium Light, 24-Inch Timer controls T5 HO Fluorescent Lamps and Lunar LED's independently Adjustable width Aquarium Frame Mounts support fixture above the aquarium German-made specially angled reflectors maximize light by directing it into the aquarium Built-in Fans keep larger models cool and direct heat away from the aquarium Suspension Ports allow connection to optional cables for various mounting configurations