[tang daddy]

if you go for the lager pendants like a lumenbright or lumenmax you will still have a problem with coverage on the 35"wide tank as I use to have 2 lumenbright pendants and they only covered 2x2ft. I run 2x250w hqi now and notice that they are brighter than my 2x400 se.

Twon why don't you keep the 400w fixture in the front and put a 250w hqi in the back, then later sell the 400w and get another 250w and run them side by side. I don't think that your house ac can keep up with the heat of you mh in the summer and you will have to get a chiller anyhow there is a guy on craigslist selling a hqi system for $200 go for it!!