I see people doing DIY MH fixtures and I came to a relatively obvious question- why not just use a 150-300w Quartz-Halogen fixture? They're cheap as all get-out, provide pretty much the same amount of lumens and heat and cost a lot less. I know the reef guys use MH for the color temp needed to simulate direct sunlight in a reef, but is the color temp of QH not suited for a planted tank?
Tommy
Tommy