Incandescant Lighting

With all this talk about flourescant and MH lighting I
thought I'd see if anyone had any experience with plain
old incandescants. Mike T at Delaware Aquatics told me they
grow great plants, if you use the clear bulbs. Not frosted.
I might give it a try in a 20 gl. 4-5 watts per gal. Gotta
be the cheapest way if it works. Anyone tried it yet?