Just look for the ones that look like a coil. Try to get at least 23+ watters as that's about as small as you should go but then you should be using as many as you can afford (within reason...not like 1000 of 'em! ha but a few of them at least). 45 or the 65's that HD suggested all the better. The more light the better. Then put them right down on the plant at a minimum of 1-2" from it and just keep it that close. They'll grow.