condition mean min max 4 h after light 7.23138 7.12193 7.34083 8 h after light 6.62791 5.26102 7.9948 12 h after light 6.068365 5.48039 6.65634 4 h after dark 9.794056666666666 9.2812 10.5723 8 h after dark 5.68247 4.28299 7.49446 12 h after dark 7.969413333333333 6.83448 9.1267