condition mean min max 0 h after light 2.28315 1.94698 2.61932 2 h after light 1.19621 1.06209 1.33033 4 h after light 1.02656 1.01388 1.03924 8 h after light 7.486715 6.24741 8.72602 12 h after light 8.868145 6.70209 11.0342 2 h after dark 7.74212 6.54897 8.93527 4 h after dark 7.93739 7.91217 7.96261 8 h after dark 4.50581 4.20876 4.80286 12 h after dark 1.94618 1.33142 2.56094