Light bulb

This bulb was made in dark blue glass for use during the blackout.   Preparations for mass bombing began long before the war broke out. Guidance on blackout restrictions sent people out to buy thick curtains, blackout paint, cardboard, brown paper, glue and drawing pins - all to blot out the least glimmer of light from windows in case it should help enemy bombers find their target.   The real blackout began on the night of 1st September 1939, when all streetlights were turned off and cars crawled along roads with their headlights turned off. The results were worrying. Pedestrians tripped over kerbstones or crashed into one another on the pavement. The number of road accidents soared, and the total killed on the roads almost doubled.