condition mean min max 0 h after light 0.0909726 0.0908915 0.0910537 4 h after light 0.0911129 0.0896141 0.0926117 8 h after light 0.0 0.0 0.0 4 h after dark 0.0 0.0 0.0 8 h after dark 0.0447584 0.0 0.0895168 12 h after dark 0.223958 0.181539 0.266377