I can tell you that A.N. equipment is as good as their nutes. And their nutes are excellent in my opinion. With the exception of pH Perfect base nutes and all the chelates that goes into a pH Perfect nute they have well developed and highly engineered plant nutrients. The low frequency ballasts are not known for any defects or meltdowns during operation. Just a bit pricey but have you looked at Eye Hortilux low frequency ballasts?