condition mean min max 4 h after light 8.29308 6.22236 10.3638 8 h after light 6.033785 5.33399 6.73358 12 h after light 10.10346 9.71562 10.4913 4 h after dark 18.0937 17.313 19.5674 8 h after dark 13.806833333333334 12.8576 14.346 12 h after dark 9.37101 6.81703 11.1585