I am looking to set up a 4x4 tent for veg was looking to buy a 320 watt QB 648, but most stores are sold out already. Not sure if the 260 would be sufficient light spread, as I am hoping to veg at least 8 plants for 4 weeks before transferring them to a 4x8 tent. Would I just be better off grabbing 320w v2 b spec? Any thoughts or opinions are appreciated, thanks!!