Now this was written to someone else so dont get confused. But this should help for what your trying to do bro.
a high pressure sodium bulb, Atleast a 150 watt bulb. Now you need this because when its in its flowering cycle. That type of light puts out an amber color light which is perfect for producing large bulky buds. Trust me the type of lighting you have right now is not enough. You need the right light spectrum. Another thing you need to know is that all HID lights (high pressure sodium, Metal hallide, Ect.) must operate in a specific fixture which contains something called a ballast. A ballast is needed even if its something as small as a 50 watt HPS bulb, Because it ignites the bulb, Remember that absolutely no HID light bulb will work in ANY normal household light socket. It must have a ballast. You should go to lowes or home depot, They sell fixtures that go up to 150watts (which you should get) For under 100 dollars. The 150w fixture is your best bet, because it is cheaper than the 100w fixture remember that. The 150watt fixture costs $52. Now if your only growing one plant, you can pull it off with a 70W fixture. Thats what i have, along with 2 large cfls, A 120W Dual florescent light fixture, an extra florescent, Plus the 70w hps bulb. And i grow one plant with that. And it is quite effective. If i were you though id go with the 150 watt fixture, because its more power for a better deal. The only reason i didnt get it is cuz they were out of stock. Trust me you need it though......GET IT.
Here is some info on fertilizers. get one like 10-30-15, or 15-30-15. Just make sure the nitrogen level is lower than the phosperous level ( which is K on the N-P-K ), for flowering you also want a pretty good ammounty of potassium. this is all for specifically budding, low nitrogen and high phospherous and potassium. Basically start cutting off the nitrogen level, and keep raising the phospherous and potassium levels. Not by too much though. Thats just what they need for flowering. Get a fan to blow on the plant while the lights are on you want the temp in the 65-80 degree range, no lower than 60 but no higher than 80. Also if you use a fan the stem on your plant will become much thicker and stronger.
I dunno I iz teh nub!