condition mean min max 4 h after light 2.8 2.8 2.8 8 h after light 7.5 3.2 11.8 12 h after light 3.3 1.4 5.2 4 h after dark 3.5500000000000003 2.7 4.4 8 h after dark 2.5 1.8 3.2 12 h after dark 2.35 1.5 3.2