condition mean min max 4 h after light 3.0 3.0 3.0 8 h after light 9.2 4.6 13.8 12 h after light 6.65 5.9 7.4 4 h after dark 3.55 3.3 3.8 8 h after dark 10.149999999999999 1.9 18.4 12 h after dark 5.65 4.7 6.6