Keep your hydroponics system operating at peak efficiency with this powerful light Lamp emits full-spectrum light, increasing your growing success with starts, cuttings, herbs, flowers, or vegetables Ideal for a small operation or as part of a commercial outfit; Dimensions (L x W x H): 25.22 x 4.73 x 2.05 inches Built-in timer allows you to set 12 hours on/12 hours off or 18 hours on/6 hours off schedule Includes electronic ballast, 8-foot 120V power cord, and instructions; Use with Snap-On Reflector (JSFR2/JSFR4) for more directed light (sold separately)