condition mean min max 4 h after light 0.549205 0.0 1.09841 8 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 4 h after dark 0.481863 0.0 0.963726 8 h after dark 0.238034 0.0 0.476068 12 h after dark 0.0 0.0 0.0