But these days, if lit-up letters in a shop window or on the wall of a nightclub catch your eye, odds are they’re made with light-emitting diodes, or LEDs, not the real thing. It’s a fate befalling ...
Once you couldn't walk down a city centre street without being surrounded by the glow of neon signs - from the famous lights of Piccadilly Circus and the Blackpool Illuminations, to the 'DINER' sign ...