condition mean min max 0 h after light 15.69735 14.202 17.1927 2 h after light 7.29653 6.71097 7.88209 4 h after light 6.077755 5.62103 6.53448 8 h after light 6.683735 6.42023 6.94724 12 h after light 7.985215 7.58944 8.38099 2 h after dark 8.61068 8.33829 8.88307 4 h after dark 11.30485 11.2261 11.3836 8 h after dark 16.92295 16.6973 17.1486 12 h after dark 16.8173 16.304 17.3306