condition mean min max 4 h after light 1.9750100000000002 1.58909 2.36093 8 h after light 1.92685 1.65269 2.20101 12 h after light 2.340945 2.15522 2.52667 4 h after dark 2.2232666666666665 1.63082 2.7735 8 h after dark 2.385946666666667 1.88124 3.14853 12 h after dark 2.12499 1.76919 2.39382