Definitely not high, maybe medium, but on the low side at that. If you're going screw-in type, use a 19w day bulb from home depot instead, that'll definitely put you in the medium range.
I'd say that APP or riccia might work, the HC probably not. APP tends to like less CO2 so it should do well there. If you go riccia, try fish line to tie it.
edit--> Monosolium Tenerum is a nice and easy plant to grow. The demands submerged are a lot less than riccia's, and it sinks instead of floating, though it doesn't attach like mosses do.