there can be advantages to multiple lights in one space.
the issue with mars is you never know what you're gonna get. they swap components and chipsets 3 times out before breakfast. the same rig comes in multiple configs, so you might get lucky, but chances are the spec sheet will change between purchase and delivery.
Expensive lights don't always mean they are the best lights either. I spent $1050 ea. on 2 - P900's. My 3 Mars Hydro TSW 2000's at $260 ea. blew those expensive lights out of the water.
the issue with mars is you never know what you're gonna get. they swap components and chipsets 3 times out before breakfast. the same rig comes in multiple configs, so you might get lucky, but chances are the spec sheet will change between purchase and delivery.