How much light?

I've ordered a 75 gallon with 2 48" 40 watt tubes, which will be (hopefully)
a planted goldfish tank. I also have a 45 gallon (36"Lx24"Hx12"W) that I am
going to set up as an amazon biotope, also planted. Can anyone make
recommendations as to lighting (intensity, bulb types) and plants suitable
for the goldfish. In the Amazon tank, I'll be using primarily vallisneria and
amazon swords (with angels and tetras). 

Tony McDaniel