condition mean min max 4 h after light 19.0 19.0 19.0 8 h after light 7.6 6.2 9.0 12 h after light 8.75 7.3 10.2 4 h after dark 8.4 5.0 11.8 8 h after dark 10.0 9.1 10.9 12 h after dark 6.949999999999999 5.8 8.1