condition mean min max 4 h after light 5.88948 5.33228 6.44668 8 h after light 7.931935 7.53828 8.32559 12 h after light 9.371234999999999 9.34419 9.39828 4 h after dark 8.64602 7.92651 9.28025 8 h after dark 7.41444 7.3557 7.50927 12 h after dark 7.57299 7.37415 7.78917