condition mean min max 4 h after light 1.7771599999999999 1.27798 2.27634 8 h after light 2.9032299999999998 2.23486 3.5716 12 h after light 2.9734249999999998 2.07536 3.87149 4 h after dark 3.4617 3.19963 3.61876 8 h after dark 3.0481 2.74266 3.33924 12 h after dark 2.1256266666666668 1.76031 2.47837