condition mean min max 4 h after light 10.160725 8.82265 11.4988 8 h after light 9.194005 8.44969 9.93832 12 h after light 10.82165 10.5297 11.1136 4 h after dark 12.584 11.8531 13.3149 8 h after dark 11.639 11.4453 11.8327 12 h after dark 11.8386 10.6117 13.0655