All of the 12 different accessories that Fergusson made were low-cost items that could be used on "mechanical" (wind-up, non-electrified) train set ups. None of the signals or lights were electrified. The lamp post was a "dummy", with a white-painted die-cast bulb under the reflector. The poles were solid, not made for wires to be run up them.
Of course, there are always the tinkerers among us who delight in modifying tinplate... looks like someone did a modification which at one time brought Edison's wonderful invention to your Fergusson lamp pole!
david