Lighting Building light for a 4x4

[brian247]

Hey how are you guys, so I am going to have to build up a light for a 4x4 space. I am looking to run the most efficiently as possible so I dont mind running many cobs at low watts, in fact that is exactly what I want so i can have more of a footprint and maybe even do some lenses to increase penetration(just a thought). I will be building up multiple lights in the next month or two for multiple grows so if y'all can give me some input that would be greatly apreciated!
ps I have a 100w 4 cob led light running atm on my seedlings and they are loving it, I have to get this other light built up ASAP for these girls!

 

[KonopCh]

600W of COBs or Samsung/Bridgelux strips. Buy them as many as you can. Drive them soft, with strips you don't need heatsinks.
And you'll have, like you said, "the most efficient as possible" light.

 

[KonopCh]

Or be more realistic and drive them at 700 or 1050 mA.