condition mean min max 4 h after light 5.9 5.9 5.9 8 h after light 8.25 3.1 13.4 12 h after light 0.9500000000000001 0.8 1.1 4 h after dark 8.75 2.9 14.6 8 h after dark 10.3 1.8 18.8 12 h after dark 7.3500000000000005 3.4 11.3