Questions on Maiden's Hair

I want to get some Maiden's Hair to add some color to the tank and also see if my Clown might host it. Currently my el cheapo bulb is a 24" Power-Glo 20w, my hood only has room for 1 bulb
Would I need to upgrade my bulb in order to have it survive? It is fairly close to a window and sunlight hits the tank for a couple hours a day. (not sure if this would help at all)
Could you recommend a bulb for me if not?
Please excuse my nubness.
Thanks,
 
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