condition mean min max 4 h after light 291.540149 280.848241 302.232057 8 h after light 312.1451095 277.950305 346.339914 12 h after light 338.446341 324.455145 352.437537 4 h after dark 456.623383 422.640469 490.606297 8 h after dark 473.722331 403.385903 544.058759 12 h after dark 564.078946 564.078946 564.078946