Oooh...the Vallisneria Nana is exactly the kind of thing I was looking for!
It looks like it likes medium/moderate light. I'm trying to figure out what I have.
My tank is on a table about 6 feet from my patio door. That door gets full sun in the mornings, till about 11 am. We have thin white curtains, so I would call it diffused light. So there's a few hours of natural sunlight there.
My lights are the LEDs that came with my Marineland 20G. I'm having a hard time finding out what temp (Kelvins) that light is...
R.I.P. Akira aka Feisty Fins (August 10, 2012)