condition mean min max 4 h after light 17.86065 16.7618 18.9595 8 h after light 15.901900000000001 15.4673 16.3365 12 h after light 15.84545 14.893 16.7979 4 h after dark 17.650233333333333 17.417 17.8962 8 h after dark 18.8676 18.3099 19.4237 12 h after dark 17.406333333333333 16.1919 18.0948