Wilt wrote in post #18252883
The Godox AD360 claims are 360WS and GN80 (m ISO 100, with standard reflector)
Converting the GN to feet, it is about GN260. So at ISO 100 (Sunny 16 1/100 f/16) the flash is capable of overpowering the sun by 1EV (f/22) out to 12' distance.
I had to go out and learn some math to figure all those numbers out, whew!
I see that the 360 is advertised as GN56 and the 600 as GN87 from sites I have found. Seems to vary all over the place though depending on which of the different brands this goes under, and the sites themselves.
So if I learned anything by my reverse-engineering all of that since I have had no classes and had to google for GN calcs and relearn sunny 16, that means at ISO 100:
Streaklight 360: GN 185' -> 8.5' out to overpower the sun @f22
Xplor600: GN 287' -> 13' out to overpower the sun @f22
Does this look correct? With any kind of softbox on there, I will have to bring my aperture down accordingly to keep the same shutter, to make up for the lost light, or bring the light closer, correct? Bringing the light closer though introduces issues unless I put a large diffuser on it for full-body shots, which then puts me back into opening up the aperture to make up for that. (or use both my AD360s at nearly the indicated distances above, but more cumbersome).
This is stuff I need to pick up pretty quickly for senior portraits outside. I try to stay out of direct sunlight though when possible, but now that I have 2 AD360 units, I don't have to be so picky.