Ion LED 720W LED Fixture 120v - 277vIon has created the next generation of full spectrum commercial LED fixtures. Ion 720w grow lights are the most powerful LED in its class with a standard ppf of 1800 1944 umol s and an impressive efficacy of 2. 6 mol J per watt. The Ion LED was built for professional cultivators who demand the ultimate yield and quality. Superior Performance Experience unmatched power and performance with 1800 mol s total output and 2. 6 mol J system efficacy.