Integrating Pane TileLayers with LayerGroup Control (V1.0) - leaflet

Question

I am trying to find a method of integrating the layer group control with the method of having 2 tile layers visible to enable the labels to sit above the polygons I generate.
http://leafletjs.com/examples/layers-control.html - layergroup guide
http://leafletjs.com/examples/map-panes.html - panes guide
My aim is to have the often used dark and light cartodb maps as options - but still making use of the panes functionality.
I have attempted to have something like the below however I don't believe leaflet is capable of handling it in this way.
Has anyone found a method yet to integrate this correctly?
var darkTile = L.tileLayer('http://{s}.basemaps.cartocdn.com/dark_nolabels/{z}/{x}/{y}.png', {
attribution: '©OpenStreetMap, ©CartoDB'
}).addTo(map);
var darkLabels = L.tileLayer('http://{s}.basemaps.cartocdn.com/dark_only_labels/{z}/{x}/{y}.png', {
attribution: '©OpenStreetMap, ©CartoDB',
pane: 'labels'
}).addTo(map);
var lightTile = L.tileLayer('http://{s}.basemaps.cartocdn.com/light_nolabels/{z}/{x}/{y}.png', {
attribution: '©OpenStreetMap, ©CartoDB'
});//.addTo(map);
var lightLabels = L.tileLayer('http://{s}.basemaps.cartocdn.com/light_only_labels/{z}/{x}/{y}.png', {
attribution: '©OpenStreetMap, ©CartoDB',
pane: 'labels'
});//.addTo(map);
var light = {
lightTile,
lightLabels
};
var dark = {
darkTile,
darkLabels
};
var baseMaps = {
"Light" : light,
"Dark" : dark
};
L.control.layers(baseMaps).addTo(map);

Answer 1

Make sure you create your pane explicitly:
map.createPane("labels");
Create Layer Groups to gather your Tile Layers (basemap and labels) instead of plain JS objects. Leaflet will not use your plain objects.
var light = L.layerGroup([
lightTile,
lightLabels
]);
var dark = L.layerGroup([
darkTile,
darkLabels
]).addTo(map); // Add the group to map, rather than its individual layers.
Demo: http://jsfiddle.net/3v7hd2vx/45/