Underside of T5 HO Fixture Three Channel Timer Control Aquatic Life 4-Lamp T5 HO Aquarium Light Fixtures The Aquatic Life 4-Lamp T5 HO (High-Output) Fluorescent aquarium light fixtures employ the latest leading edge technology for both the novice, and expert Marine hobbyist. The fixtures feature a programmable, three channel digital timer that controls the T5 HO Lamps and Lunar LED’s independently for complete, around-the-clock lighting of the aquatic environment. This lighting system features a combination of 700+nm/10,000K, 420/460nm Actinic, 460/620nm Purple, and Blue LED Moonlights to promote exceptional growth and color in Corals and Invertebrates, as well as eye-popping vivid colors of fishes. Aquatic Life 4-Lamp T5 HO Fixture Features & Benefits: German-made individual lamp reflectors direct maximum light output down deep into your aquarium, and Aquatic Life Marine lamps use phosphors that replicate what corals, plants and fish receive naturally. The built-in fans on larger models help direct heat away from your aquarium. All electronic ballasts are internal and are equipped with quick disconnects for easy serviceability or replacement. Adjustable width frame mounts securely hold fixture on virtually any type of aquarium, even frame-less designs. The optional suspension wire kit (#420063) enables the light fixture to be hung over the aquarium in almost any position. All models feature a single 2-meter power cord, allowing easy mounting or suspension. Our Most Popular T5 HO Fixtures Offer Power, Features and Reliability in One Compact Unit! Three Channel Timer controls T5 HO Fluorescent Lamps and Lunar LED"s independently - Adjustable width Aquarium Frame Mounts safely 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. Aquatic Life 4-Lamp T5 HO Marine Light Fixture Sizes & Specifications: Model #420013, 20-Inch T5 HO Light Fixture-74 Watts Maximum Output: (2) 18" T5 HO 18W 420/460nm Actinic Lamp, (1) 18" T5 HO 18W 700+/10000K Daylight Marine Lamp, (1) 18" T5 HO 18W 460/620nm Purple Lamp, (2) 1W Lunar LED’s, (4) Aquarium Frame MountModel #420035, 24-Inch & Model #420151, 30-Inch T5 HO Light Fixtures-98 Watts Maximum Output: (2) 24" T5 HO 24W 420/460nm Actinic Lamp, (1) 24" T5 HO 24W 700+/10000K Daylight Marine Lamp, (1) 24" T5 HO 24W 460/620nm Purple Lamp, (2) 1W Lunar LED’s, (4) Aquarium Frame MountModel #420036, 36-Inch T5 HO Light Fixture-159 Watts Maximum Output: (2) 36" T5 HO 39W 420/460nm Actinic Lamp, (1) 36" T5 HO 39W 700+/10000K Daylight Marine Lamp, (1) 36" T5 HO 39W 460/620nm Purple Lamp, (3) 1W Lunar LED’s, (4) Aquarium Frame MountModel #420037, 48-Inch & Model #420186, 60-Inch T5 HO Light Fixtures-220 Watts Maximum Output: (2) 48" T5 HO 54W 420/460nm Actinic Lamp, (1) 48" T5 HO 54W 700+/10000K Daylight Marine Lamp, (1) 48" T5 HO 54W 460/620nm Purple Lamp, (4) 1W Lunar LED’s, (4) Aquarium Frame MountModel #420038, 72-Inch 8-Lamp T5 HO Light Fixture-318 Watts Maximum Output: (4) 36" T5 HO 39W 420/460nm Actinic Lamp, (2) 36" T5 HO 39W 700+/10000K Daylight Marine Lamp, (2) 36" T5 HO 39W 460/620nm Purple Lamp, (6) 1W Lunar LED’s, (4) Aquarium Frame Mount