condition mean min max 3 h after light 14.282866666666667 12.5633 16.1049 6 h after light 12.835216666666666 9.45225 15.2189 9 h after light 11.4461 10.0192 12.9005 12 h after light 14.864525 12.1483 17.2019 3 h after dark 16.744 15.9132 17.2681 6 h after dark 19.1528 18.0341 21.144 9 h after dark 16.003233333333334 15.3725 16.6428 12 h after dark 16.9332 16.5388 17.3276