condition mean min max 4 h after light 2.1 2.1 2.1 8 h after light 4.699999999999999 4.3 5.1 12 h after light 17.35 9.0 25.7 4 h after dark 6.4 6.1 6.7 8 h after dark 3.5500000000000003 2.2 4.9 12 h after dark 2.0 1.8 2.2