FWIW, I adjust my F.lux setting all the time! When the sun sets at 5pm but I'm still working in a brightly-lit office, I hit "disable for an hour." When I'm in

FWIW, I adjust my F.lux setting all the time! When the sun sets at 5pm but I'm still working in a brightly-lit office, I hit "disable for an hour." When I'm in a completely dark room, I switch it all the way to the dimmest "candle" setting.