These incandescent Hoods can be used on most brands of aquariums. They fit on the lip of the aquarium frame for a nice, finished look. The Economy 16" and 20" Hoods feature a one piece design with lexan Blub splash shields for longer Blub life. 16" and 20" Deluxe Incandescent Full Hoods feature Full length Door and convenient rear cut-out sections for popular accessories. All Hoods are the latest design and are U.L. listed. Blubs are not included.