i think i have the same hood. what light bulbs are you using, and what has your growth been like?
The lights are regular grocery store lights they just have the right/best Kelvin range for plant growth. Plus at 15w with an output equivalent to 75w of an incandescent bulb, if we use the very old and in-accurrate measure of watts per gallon, I'm around 15 wpg.
In actual fact the growth has been pretty good. I had to trim my tank and remove at least a small grocery bag full of Vallisenaria. I had to cut back the Hygrophila quite a bit.
Will post a pic of the tank in 2 weeks. The only other thing i'm going to add is 3 root tabs tomorrow. There's also a tiny piece of Hygrophila Polysperma ‘Rosanervig' in there that i thought was dead but i replanted it anyway and i'm seeing growth. So let's see how it goes.