condition mean min max 4 h after light 5.400945 5.06356 5.73833 8 h after light 4.651045 4.61488 4.68721 12 h after light 3.938955 3.79241 4.0855 4 h after dark 6.655125 6.16798 7.14227 8 h after dark 8.495330000000001 7.89585 9.09481 12 h after dark 8.927785 8.74815 9.10742