hmm. well, you want the 6500k spectrum for veg.. i don't ever see a problem mixing spectrums either tbh, just make sure you have more in the veg spectrum than you have in the lower 2700k flowering ones, but that's up to you really..
i'd say that using that small hoood, you could probably fit a good dozen or so under it on 16oz solo cups like how i do it, so i'd say you'd need about three or so of those hoods with two bulbs per to pull of that amount of plants..
i'll try and find the link for petsmart for the small hood that i'm using for you while i'm bored..