condition mean min max 3 h after light 0.8966383333333333 0.394769 1.34481 6 h after light 0.872845 0.74775 1.00846 9 h after light 1.2893613333333334 0.933714 1.62792 12 h after light 1.43029 1.08567 1.72651 3 h after dark 2.27187 1.91685 2.62157 6 h after dark 3.9056 3.5469 4.45077 9 h after dark 3.1982266666666668 2.69796 3.97489 12 h after dark 1.80342 1.70425 1.88241