condition mean min max 3 h after light 2.55681 1.33832 3.27353 6 h after light 3.09555 2.42206 4.42348 9 h after light 3.36912 2.55887 4.89218 12 h after light 2.75293 1.34907 4.81706 3 h after dark 3.3705366666666667 2.3622 4.03522 6 h after dark 3.02226 2.04069 4.0841 9 h after dark 2.6922533333333334 2.3305 2.92638 12 h after dark 1.28943 1.21429 1.36457