Well from my perspective in a 4x4 I can maintain Temps really well with 2 solar storm 440s or one 880. As far as light spread goes. It depends on plant size. Like for you meef you could do 2 plants every 40 days and have 4 plants at a time in your tent daisy chaining those lights and being able to cater light height towards each plant. Or do you want to just grow 2 monsters at a time? I've grown very fond of the solar storm 440s and have been running them with 2 plants under each one. If you were looking at 4 plants max then that would be good. But bear in mind your 220s are half the equivalent of a 440 without the UVB. Maybe contact California lightworks and ask what a trade in would be they may send you boxed up new ones with return labels for the 220s . Or just keep your overhead down and pay for 1 more 220 and daisy chain. Those massive auto ultimates are blooming under one 440 each at the moment so you could do 2 XXL plants off the 4 lights. Choices ...choices... what's the cost difference between 4x4 and 5x5?
I would like to alternate 4 plants so I can have variety. The price difference is $40 more, it may be worth investing in. I would LIKE to keep my overhead down a bit since I'm going to drop so much cash on a larger setup. I spoke with CLW and they can't offer me any estimates until I ship my lights in. I also believe that I'll be able to control my temperatures much better in a larger tent, versus now with so many electronics crammed into one skinny area.
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