The advantages of LEDs


A light diode (LED) is an electronic semi-conductor element, that converts electric current directly into light – when electric current is streaming through the diode in the direction of transmission, it emits light. LEDs consume little energy, do almost not generate heat, do not contain infrared heat or UV rays.


They are shock resistant, do not have an incandescent filament, reach significantly shorter switch periods and have a very long life. Other than incandescent lamps, light diodes are not heat emitters. They emit light in a limited spectral segment, the light is almost monochromatic. They are therefore - compared to other light sources, where color filters have to filter out the major part of the spectrum - very effective for signal installations. Light diodes do usually not break down they only become weaker. They do not have a hollow body which could implode. Their duration of life depends on the semi-conductor material and the operating conditions – high temperatures due to high current shortens  their duration of life. Light diodes are usually operated by using a series resistance (rectifier) or  a constant current source – the voltage of this must not be exceeded. The indicated lifetime ranges from some 1,000 hours at 5 W LEDs to more than 100,000 operating hours at LEDs, that operate with low power.