The ROI-E680 is a high-performance LED grow light, ideal for small and large indoor growth systems. Its 1700 Umol/sec output provides just the right environment for sufficient indoor growth.With up to 40% better efficiency, the E680 can cut down your bills while providing a full spectrum of light at a 120-degree distribution angle. It features better controllability at ranges beyond 660nm, giving more realistic growing conditions for photosynthesis.The light is suitable for mounting at any height beyond six inches. It offers passive thermal ma