Having your lights set at the correct distance is one of the most important things. This Univeral T5 Stand will help you get the distance just right! For most growing applications the optimum distance is 3-6 inches. Simply raise or lower the height by using the O-Ring adjusters and dial in the perfect distance. Built to last this unit is made from molded plastic and powder coated aluminum. For use with SunBlaster T5 fixtures.