condition mean min max 4 h after light 39.6021 34.8054 44.3988 8 h after light 24.7462 24.1677 25.3247 12 h after light 14.82815 12.7085 16.9478 4 h after dark 16.9912 16.9026 17.0798 8 h after dark 16.7523 15.0097 18.4949 12 h after dark 24.59805 22.3257 26.8704