condition mean min max 4 h after light 1.8157549999999998 1.62719 2.00432 8 h after light 2.55624 2.5044 2.60808 12 h after light 3.72731 3.42794 4.02668 4 h after dark 4.229365 3.78355 4.67518 8 h after dark 2.477445 2.29614 2.65875 12 h after dark 2.033515 1.71047 2.35656