We sell many Gavita's in the grow shop and all the customers feedback has been great. The 400v technology is a must for any grower. Gavita’s roots are in horticultural projects, lighting climate rooms and greenhouses with tens of thousands of fixtures. For commercial growers we combined the efficiency of 3 phase systems with the ease of control of the Gavita Master Controller. Grow it yourself Hydroponics highly recommend the Gavita products.