condition mean min max 4 h after light 1.321905 0.44452 2.19929 8 h after light 1.27118 1.22888 1.31348 12 h after light 2.052455 1.78572 2.31919 4 h after dark 1.73851 1.4968 1.86201 8 h after dark 1.46253 1.44477 1.48939 12 h after dark 0.9832483333333334 0.744032 1.29231