condition mean min max 4 h after light 9.011865 7.86803 10.1557 8 h after light 8.911999999999999 8.49147 9.33253 12 h after light 9.229685 8.87631 9.58306 4 h after dark 10.53289 9.70338 11.9646 8 h after dark 10.171009999999999 9.90993 10.5007 12 h after dark 9.37094 8.89189 9.78186