yah that does indeed make since. You can have as much watts as you want without killin the plant correct? its just the heat problem. Its now crossed my mind to just buy like 10 t-5s for vegging. I really dont want to stick with that idea due to the fact it wont come out thick and bushy right? I really do indeed think that if use one 400 MH light with t-5s around it i could manage the heat. One marjor concern i have is can you add t-5s to surround the plant while your flowering with a HPS, or it T-5's more of vegation bulbs.