The Radiant is designed to deliver the brightest possible light down to your plants. The patented double-wall design and generous reflective cavity make it the coolest running fixture on the market. Constructed of heavy duty pre-galvanized steel and lined with high purity European aluminum. The Radiant will give years of dependable growing performance. Made to direct light downward for maximum light intensity and growth. UL Listed. Measures 9 3/8” x 21” x 21”. DOES NOT INCLUDE SOCKET OR LENS