Under 2 - 600 w lights hanging end to end, would it be better to run 2 rows of 6 buckets or 3 rows of 4 buckets? Will the controller bucket have any noticeable difference in filling 6 buckets?
3 rows of 4 for sure. Light spreads out either side of the bulb better than end to end because the fixture blocks some of the light . I don't understand the control reservoir question
Question was poorly worded. It is no longer valid as I agree with your recommendation of 3 rows of 4.