condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.0275307 0.0 0.0550614 8 h after light 0.0267315 0.0 0.053463 4 h after dark 0.0 0.0 0.0 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0