Hi if i wanted to grow 6 plants in a walk in closet, aprox 5 foot by 3 foot, how many 4 foot fluorescent ballasts would i need? right now i have 4 t12 ballasts each with 2 four foot 45 watt bulbs. so 8 bulbs total, 4 day light, 4 cool white. is this enough? do i have the right bulbs i need.