condition mean min max 4 h after light 14.6 14.6 14.6 8 h after light 8.45 6.4 10.5 12 h after light 9.95 7.5 12.4 4 h after dark 8.25 7.4 9.1 8 h after dark 28.35 12.6 44.1 12 h after dark 6.85 6.6 7.1