my heat is 3 degrees above the room outside, my ballasts are remote. True, my MV's only do like 54 lumens per watt, but with the hps in there too, they make up for 30+ 26w cfls. (48,000 lumens in there over 4.5sq ft) I'd rather wire-up what I got. I did fight off invading thrips today, successfully with water and habenero sauce mixed. I have 2 175w mv's and a 150w hps along with 2 4ft floro tubes (mentioned way earlier in post). Jeeez, I got pretty plants and I still get bashed for my "crappy lighting".