I just shot some Tmax 100 BW, full body portraits in a small studio, f/11 or f/16. My power pack is currently 400 watts.

Too much stuff out of focus.

I'm wondering if any of you have shot at 400 with 4x5 and blown up large (40 x 60) and have great results (as opposed to shooting at 100)

thanks, (curious on color experiences as well as BW)