condition mean min max 4 h after light 13.46605 11.7552 15.1769 8 h after light 13.2345 12.9639 13.5051 12 h after light 14.391 14.1223 14.6597 4 h after dark 15.056066666666666 14.0784 16.7153 8 h after dark 16.2649 15.4126 16.7029 12 h after dark 17.487033333333333 15.5783 18.8932