Enough for what ? How many plants? The size I grow, one 315 will bloom 2 plants, but If plants were smaller, then maybe you could get 6 under same 315. Or 30 plants in a SOG. Your 315w lec will cover a 4x4 during veg., but only a 3x3 space in bloom. Your other issue is your cob job fan. That should be your next purchase. You will never be successful, without good air circulation. And duct air from an open window, if possible. I would remove the 8 bulb light, cause that 315 is going to cover your 3.5x4 area. I grow 4 plants, in a 4.5x4.5X6.5. In the past, I have grew 9,. 6, 5, but I find for my style of growing, 4 plants works best for me. if you want to grow anything though, you have no choice but to get the fan & filter. And if you wanted to add one more 315w lec, then you would rock that 3.5x4. I run a 630 lec in one of my 4.5x4.5 spaces and it does a fine job. But I run a 6" exhaust fan on high, most of the time. High today was 24, low tonight is 13.