condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.088839 0.0 0.266517 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 0.0 0.0 0.0