A mate of mine is looking to upgrade lights and was saying he wants to buy a digital ballast and 600w hps/MH light for his 2x2x1.8m tent which had a 400w hps but I have been trying to pursuade him to go led like I am and I think it's worked, so what would be the best option for the money? I was thinking making a ballast with say 4x vero 29 3000k and 2x 5000k at about 70w each would this do the job?