condition mean min max 4 h after light 9.608772 9.602181 9.615363 8 h after light 8.594294999999999 8.350734 8.837856 12 h after light 9.313717 7.733843 10.893591 4 h after dark 7.93357 7.63394 8.2332 8 h after dark 8.634435 8.308861 8.960009 12 h after dark 8.837856 8.837856 8.837856