condition mean min max 4 h after light 0.1738745 0.0 0.347749 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 0.0 0.0 0.0 12 h after dark 0.151746 0.0 0.455238