condition mean min max 4 h after light 15.10265 13.2243 16.981 8 h after light 19.9959 19.5587 20.4331 12 h after light 14.78615 13.0646 16.5077 4 h after dark 19.0402 18.2351 19.8453 8 h after dark 14.669799999999999 13.5644 15.7752 12 h after dark 17.595950000000002 16.835 18.3569