glass lampshade for a light bulb at a London Transport station, shortly before it was replaced by fluorescent lighting
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/47739225@N08">citytransportinfo</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/citytransportinfo/49279314923/">bulb lampshade unknown stn</a>