i was wondering how big a difference the lights make. i'm in the middle of my first harvest and all the buds are tiny. i have 11 plants and i'll be lucky to get 4 ounces! there's a lot of buds, but they're just no big. we used 1,000 watt MH m bulbs, we had 2, but one broke in a 15 x 6 sq. ft...