condition mean min max 4 h after light 6.7 6.7 6.7 8 h after light 10.05 4.2 15.9 12 h after light 30.4 13.7 47.1 4 h after dark 4.3500000000000005 1.8 6.9 8 h after dark 11.25 8.9 13.6 12 h after dark 11.2 5.6 16.8