condition mean min max 4 h after light 2.1377 1.47462 2.80078 8 h after light 1.593565 1.57454 1.61259 12 h after light 2.04934 1.92301 2.17567 4 h after dark 2.561645 2.2066 2.91669 8 h after dark 1.9614150000000001 1.81709 2.10574 12 h after dark 2.10757 1.97131 2.24383