condition mean min max 0 h after light 1.969505 1.89452 2.04449 4 h after light 2.340115 1.76378 2.91645 8 h after light 1.012229 0.962538 1.06192 4 h after dark 1.295787 0.978874 1.6127 8 h after dark 1.69368 1.63602 1.75134 12 h after dark 1.699925 1.35265 2.0472