condition mean min max 4 h after light 8.8014815 8.733635 8.869328 8 h after light 8.607330999999999 7.870187 9.344475 12 h after light 8.8037095 8.684387 8.923032 4 h after dark 7.463235 7.280328 7.646142 8 h after dark 9.78772 8.607632 10.967808 12 h after dark 8.733635 8.733635 8.733635