I wanted to know what is more effective for me, they sell me a real 600w equipment, they are 4 clu058 - 1825 (1400 usd) , I was looking at the hlg550 or set up another configuration, which I recommend, they assure that with the clu058-1825 in 120x120 have 1000 PPFD at 50 cms.(1000 even).