condition mean min max 4 h after light 2.5 2.5 2.5 8 h after light 4.45 1.4 7.5 12 h after light 7.45 0.5 14.4 4 h after dark 7.8 1.4 14.2 8 h after dark 1.7000000000000002 1.6 1.8 12 h after dark 0.8 0.7 0.9