Earlier quoted context omitted.
I wish there was something in between 20s and 60m. When I'm doing image editing, I don't want f.lux messing with colors, but I might not notice if I have it on 60m.... 2m would be better for me than 20s.
There's a button that completely disables it for color sensitive work. That's the best option.
I only see "Disable for one hour."