Sunlight Supply's T5 36" parabolic reflector increases light reaching the tank by 300% versus using a stand alone lamp. Takes 39W T5 HO fluorescent bulb. This retrofit reflector system utilizes the highest grade aluminum currently available in the industry, a 95% German-made Tek reflective textured material. This retrofit aquarium reflector includes clips. Purchase endcaps & 39W T5HO bulbs separately. Choose from a complete selection of German and domestic T5 HO aquarium lamps.