noobie lighting question

so i started my grow, i will move to outdoor but there indoors for the first two weeks. i have one seed germinated and planted and other still waiting to be germinated but for my first seed i planted it in a cup about 1/2 inch down. i have a bearded dragon and in its cage is a UVA/UVB bulb and i put it about 2 inches under that light the only thing is that its not on 24 hours its on for about a 12 hour cycle give or take an hour or half hour, i also have a 15 watt CFL ge bulb and i was wondering would it be better to just use the cfl bulb i have and put the cup under there cuz i can leave that one on for 24 hours. and anything i have to do with the seed thats planted? how much do i water it do i have to feed it anything etc.