condition mean min max 4 h after light 20.4681 20.053 20.8832 8 h after light 42.6743 39.2971 46.0515 12 h after light 270.3255 250.636 290.015 4 h after dark 376.286 356.568 396.004 8 h after dark 179.941 177.692 182.19 12 h after dark 63.928 60.0191 67.8369