1950s tungsten train lighting

This was taken on the Llangollen heritage railway and is a steam hauled service in this case. Here we have the older tungsten 24v, 60w main lights that are fully enclosed with glass diffusers and sometimes referred to as flying saucer lights! They are seen here running just before a tunnel and are only fired up for the tunnel. Note also another light over the between the luggage racks over the window which lights the table but non of these had lamps. It was pretty dull with only these main lights! There is a battery pack under the carriage which is recharged by some kind of dynamo or alternator as the train moves. These are lovely carriages, loads of room with deep comfy seats all aligned to a window unlike modern trains that all seem to be about getting as many people as possible into a space.