@UrbanPharmer what kind of area are you covering with the 200's in veg? Do you think they can stretch to a 4x4 for veg? As plants need very little light in veg. I'm throwing my veg 420 into flower next round and either add ig200 or led to veg. 200w +/- of led can easily cover 4x4 for veg..
i'm currently using the 2 200s in a long closet, about 24 inches deep and prolly about 7 or 8 feet wide. i have the lamps about 3 feet apart, evenly spaced above the trays and teens on a short shelf below. in another corner of veg, i previously had a combo, when the 4 girls i mention in the above post were there, but now it's lit by a lame FSS 200w... just until the 4x8 finishes up then veg gets a combo back.
as for what you mentioned, a 4x4 area? i'd say a single 200 can do it, especially if we're talking about in a grow tent so that no light is lost/wasted. when i had a SunBlaze 48 a long time ago, i compared it to a 200PAR, and saw that a 200 easily covers twice the area of the SB48.
personally i believe that, when we talk of an indoor garden, light can most easily be the most growth limiting "nutrient". that being said, i'd choose to run both my 200s over a 4x4-5x5 area, but would honestly more likely run a combo... more light in veg is faster growing, stronger, healthier plants with faster to-bloom times, and a better performance in bloom. but also, the combo brings the 660nm enhancement, which i am seeing that the plants really like, even in veg. i believe the plants like the R:FR ratio more with a pontoon than without. but we're talking gravy imo, because plants prefer induction over MH and HPS in my experience.
as for my plans, as the soil plants phase out of the garden with these current runs i'll be switching over to my UnderCurrents (6XL13s). for each UC system, lighting will be 2 420 combos and 3 SunBlaze 41s w/ ReptiSun tubes, and i might utilize a LightRail, or not... jury is still out, but i have them on hand if i decide to go that way. each system will be in either a Gorilla 5x9 of HydroHut Silver 4x8 (for now, most likely going to get another Gorilla 5x9) and have it's own 1/4HP chiller. veg will be the HydroHut Silver 4x6 with a 420 combo over my DIY bucket RDWC, propagation is simple t8s from Home Depot, and the pair of 200s will service everything that is between the propagation tent and the 4x6.
that's at least the plan that's i've been holding to. hardware acquisition is functionally complete, so all i have to do now is take the time to sit back and grow these ladies out... the only thing that might vary is that i have modded one of the UC6XL13s to have 4 sprayer nozzles in each plant module, so i can basically start fresh rooted babies in the system and run it in LPA over an RDWC res with 30 or so gallons instead of the full 75. my theory is that the LPA beginnings should really muff out a fat root-beard and so to make the best of when the system goes full-wet and they shift to true RDWC.
in any case, it's defo gonna be fun! i'll finally have the time to start working on my own direct salt feed recipe!