Perfecto Recessed Full Hoods are designed to fit securely into the frame of Perfecto aquariums. The front access panel runs the entire length of the hood for daily maintenance and feeding. Textured surface won't show fingerprints. Replaceable rear plastic back strip may be cut to fit heaters, filters, and other accessories. Glass shield insert protects electrical parts from moisture and corrosion. Features: Provides light essential for live plants and enhances the color of fish. Instant start means fixture can be put on timer. Full sturdy base with White reflector for more light in aquarium. Hood comes fully assembled. Safe-glass shield protects electrical parts. Bulb included in Fluorescent hoods. No-Drip Feature added to front door. 10 Gallon - (15W - 18 Inch bulb - 20 InchL x 10 InchW x 3 InchH), 15 & 20H Gallons - (15W - 18 Inch bulb - 24 InchL x 12 InchW x 3 InchH), 20 Long & 29 Gallon - (18W - 24 Inch bulb - 30 InchL x 12 InchW x 3 InchH), 30 & 40 High Gallon - (18W - 24 Inch bulb - 36 InchL x 13 InchW x 3 InchH), 55 & 60 Gallon - (32W - 48 Inch bulb - 48 InchL x 13 InchW x 3 InchH).