condition mean min max 4 h after light 7.4 7.4 7.4 8 h after light 5.05 3.6 6.5 12 h after light 5.199999999999999 4.1 6.3 4 h after dark 6.85 4.6 9.1 8 h after dark 9.25 5.9 12.6 12 h after dark 7.7 6.5 8.9