condition mean min max 4 h after light 9.4 9.4 9.4 8 h after light 6.5 5.5 7.5 12 h after light 21.0 10.1 31.9 4 h after dark 6.75 6.4 7.1 8 h after dark 4.300000000000001 4.2 4.4 12 h after dark 11.0 10.1 11.9