condition mean min max 4 h after light 11.3274 11.0417 11.6131 8 h after light 12.4768 12.3708 12.5828 12 h after light 14.31795 13.3439 15.292 4 h after dark 16.78115 16.3616 17.2007 8 h after dark 16.59025 16.3304 16.8501 12 h after dark 15.652999999999999 14.8176 16.4884