Sun System 6 switchable HPS-or-Metal halide grow light, with the Sun Gro 20-3/4"Wx20-1/2"L horizontal Reflector. Reflector sides and ends are angled and lined with a revolutionary 95% reflective aluminum insert, louvered on one end and top and features Adjust-A-Socket mechanism to center lamp and customize light patterns. Optional 4 inch air cool fittings and tempered glass lens. Accepts all lamp sizes including BT56. 5-year rebuild or replace warranty.