London Electricity Board The Power of London Traffic Light Leonard RosomanOriginal vintage London Electricity Board poster entitled The Power of London Electricity featuring fantastic artwork From the painting by Leonard Rosoman produced for L. E. B. by the Royal College of Art showing a traffic light illuminating the streets of London with buildings in the background and people in the foreground. One of a series commissioned by the London Electricity Board (1948 1998) featuring work by various artists and produced by the