condition mean min max 4 h after light 8.73843 7.64975 9.82711 8 h after light 8.367935 7.42847 9.3074 12 h after light 7.5786999999999995 7.26249 7.89491 4 h after dark 11.8835 10.753 13.4038 8 h after dark 12.084733333333332 11.6395 12.7851 12 h after dark 10.505123333333334 9.10877 12.7659