Depends some on your area too. If those 8 containers were going in a 3 x 4 space, I would use 600 watt. If they were going in a 6 x 6 space I would use 1000 watt. I love my 600 watt digital ballast. So nice n cool.

Don't forget the big fans.
Opie Yutts Reviewed by Opie Yutts on . NEED HELP WITH LIGHTING??? While finally we have decided to go with this unit here http://www.meadowviewfeedandgarden.com/product.asp?P_ID=132 and was hoping someone here can suggest the proper lighting for this size unit , we hope to go with 400 or 600 watt bulbs , but wanted to know how many we may need for this unit for proper grow with it. Jamie Rating: 5