YOUR intake, brah. How much you smoke. It doesn't really matter; we all just use the space we have.

I grow LED, so no idea on raised bills.

That thing is perfect! Gut it, mylar it, and set up a tray at the bottom (water-proof)... OOORRR you could use the bottom drawer to hold your reservoir and the 2nd drawer up for the tray.

Try 2 plants and see what happens. Mistakes will only get you closer to where you wanna go.