i just did it today like literally just came off about 10 minutes ago and from what i had (red dolphins) it was the best day of my life i had so many like life changing thoughts and i was just so friendly to everyone it was great
it was also my first time and i honestly would rate this as my...
yo depends on the kinda cfl if its like the high watts (100+) then id say like 3 or more
but if its the little household types (43 or less) then id say 6 or more (more bulbs the lower the wattage)
of course since you have such a large space why not get a MH or HPS setup it'd be much much better...