condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 4 h after dark 0.0 0.0 0.0 8 h after dark 0.02871975 0.0282317 0.0292078 12 h after dark 0.0260601 0.0234422 0.028678