Assemble reptile terrarium with assortment of plants, rock dens, and bedding. Place the Slimline Reptile Fixture on top of the terrarium cover. A screen cover with door or center hinge is recommended, as it will allow the beneficial UV rays to reach the terrarium inhabitants easily, while allowing easy access to your reptile. Caution: Do not place fixture in direct contact with water. When mounting under a cabinet or hood, position the light fixture so the tropical lamp will provide maximum exposure of beneficial light to your reptile pets.