condition mean min max 4 h after light 8.2 8.2 8.2 8 h after light 6.35 6.3 6.4 12 h after light 4.199999999999999 3.8 4.6 4 h after dark 7.15 4.9 9.4 8 h after dark 8.75 8.7 8.8 12 h after dark 4.6 2.4 6.8