condition mean min max 4 h after light 2.3 2.3 2.3 8 h after light 1.7999999999999998 1.7 1.9 12 h after light 2.65 2.4 2.9 4 h after dark 4.55 1.9 7.2 8 h after dark 15.95 4.4 27.5 12 h after dark 2.1 2.0 2.2