It looks like your fixture can fit about 2 cfls in it not counting the lamp that currently occupied (You should really replace it with a cfl also), you should go to the store (Walmart is fine) and pick up 2-3 (Or however many you can fit in your grow space) cfl's and put them into your grow space. Im not going to get too technical on the spectrum range of the lights since its your first grow and im sure it'd sound like gibberish to you so i'd just say pick up whatever brand of cfl lights you want, just make sure you buy 23 watt bulbs as these are pretty decent for a first time grower. 100 watts should be fine for vegging and flowering but your yield is going to be very low and not as potent as you might expect but if its just for some extra personal smoke than i think you'll enjoy it.
It looks like your fixture can fit about 2 cfls in it not counting the lamp that currently occupied (You should really replace it with a cfl also), you should go to the store (Walmart is fine) and pick up 2-3 (Or however many you can fit in your grow space) cfl's and put them into your grow space. Im not going to get too technical on the spectrum range of the lights since its your first grow and im sure it'd sound like gibberish to you so i'd just say pick up whatever brand of cfl lights you want, just make sure you buy 23 watt bulbs as these are pretty decent for a first time grower. 100 watts should be fine for vegging and flowering but your yield is going to be very low and not as potent as you might expect but if its just for some extra personal smoke than i think you'll enjoy it.