These beautiful hoods are designed to perfectly complement the All-Glass aquarium. Custom fit to sit on the inside lip of the aquarium frame, which prevents water seepage. A full-length door provides roomy access in the front and cut out sections in the rear allow easy installation of heaters, power filters and other accessories. Uses a 14 Watt, 15 Inch Fluorescent Lamp. Comes with a Fresh / Saltwater GE bulb. Frame, Top Opening: 15-5/8 x 7-11/16 Inch.