600 Watt Hydro Hippo Grow Light Kit Install Space Requirement: 21-1/4in.(L) x 18-1/2in.(W) x 4-3/4in.(H) Interior Reflective Sheet Dimensions: 18-1/2in.(L) x 18-1/2in.(W) Rated Life: 24,000 hours Color Temperature: 2,100K