condition mean min max 4 h after light 10.396329999999999 8.41136 12.3813 8 h after light 9.47073 9.34347 9.59799 12 h after light 9.303975 9.05557 9.55238 4 h after dark 14.794 14.4782 15.1098 8 h after dark 13.28755 13.1653 13.4098 12 h after dark 13.0343 12.6043 13.4643