Grand Master Tarantula Revolution 600 Veg LED Grow LightDelivers 1,695 ppf at 2. 73 mol j for commercial vegetative growth, vertical racks, and mother plant operations. Your veg room determines everything downstream. Weak vegetation means smaller yields in flower, but most growers waste electricity running full spectrum lights when plants only need specific wavelengths during this critical phase. The Tarantula Revolution 600 Veg delivers 1,695 PPF of optimized vegetative spectrum at 2. 73 umol joule