ive grown and seen bud grown with incandescents but all there really good for is just that a little bud lol.
even a cfl will do you better just one of them and youll be able to cope a bit better... sorry im not a cfl user tho i got a 4 foot fluro tube and a 400w hps and a 400w mh..
i used to have 2000w worth of lighting lol (not including fluros
if you only really oly grow one plant you wont even need a 400w but its a good idea to get one. i wouldnt use any less