condition mean min max 4 h after light 1.63929 1.31029 1.96829 8 h after light 0.7973365 0.414823 1.17985 12 h after light 0.7928029999999999 0.73315 0.852456 4 h after dark 1.84738 1.39709 2.2819 8 h after dark 2.04803 1.20871 2.58678 12 h after dark 3.409386666666667 3.08636 3.58879