Need? Being low tech, I would have thought nothing.
I have never used fancy substrates, fertiliser, specialised lights or anything and have an abundance of plant growth. Go for the basic plants the lfs label as "bunch plants" and you should be fine. Also make sure your gravel is deep enough for the plant roots to establish well. I suggest 5cm or more.
Anything red needs stronger light, although my red rotala is going nuts again under very old plain daylight fluorescents :roll: