Higher visibility for LEDs

The gradually evolving technology of light-emitting diodes has of late made a quantum leap. These semiconductor devices are usurping some of the slots that, till now, had been filled by incandescent lamps and cathode ray tubes. The author describes how the luminance and luminous effiency of light-emitting diodes (LEDs) in the last few years have reached such high levels that they can replace incandescent lamps in running lights on trucks. Particularly where safety is involved, the longer life and inherent ruggedness of the solid-state devices make them a highly desirable substitute; the lower maintenance cost of the LEDs is a boon to any application.<>