I can go 250-400-or 600 watt on the lights , I have 4 5gal power growers with air pump and stones. Also decided to get 4 water pumps for inside buckets to top feed...I am going to use clay medium....I have a nice exhaust set up and 2 circulating fans one very low and one 5' high. So you think it is ok to go full blast with the lights highest setting and also as close to the newbees as possible, hand test of course?...