condition mean min max 4 h after light 11.1227445 10.971345 11.274144 8 h after light 10.46494 9.615467 11.314413 12 h after light 10.6401325 9.69001 11.590255 4 h after dark 9.296618 8.782704 9.810532 8 h after dark 10.606749 10.026407 11.187091 12 h after dark 15.105129 15.105129 15.105129