condition mean min max 4 h after light 23.0527 21.781 24.3244 8 h after light 18.37795 17.5173 19.2386 12 h after light 19.346600000000002 19.1859 19.5073 4 h after dark 30.73695 29.6235 31.8504 8 h after dark 29.89115 29.7958 29.9865 12 h after dark 30.12095 28.574 31.6679