condition mean min max 4 h after light 9.669054 9.669054 9.669054 8 h after light 10.030384 8.586856 11.473912 12 h after light 10.131875 9.304498 10.959252 4 h after dark 9.9226815 9.650615 10.194748 8 h after dark 9.6740685 9.650615 9.697522 12 h after dark 8.948263 8.948263 8.948263