condition mean min max 4 h after light 6.2 6.2 6.2 8 h after light 19.7 7.0 32.4 12 h after light 4.8 3.0 6.6 4 h after dark 9.45 7.6 11.3 8 h after dark 4.4 3.8 5.0 12 h after dark 5.8500000000000005 3.4 8.3