condition mean min max 4 h after light 8.31991 8.28756 8.35226 8 h after light 15.256 13.5945 16.9175 12 h after light 14.4205 12.397 16.444 4 h after dark 7.2497799999999994 3.66406 10.8355 8 h after dark 12.60625 10.86 14.3525 12 h after dark 16.1295 14.2555 18.0035