Investment in lighting makes good economic sense
The payback time of a modern lighting installation is short. This is partly because it is more efficient overall and consumes less energy.
However, good lighting also impacts on other economic factors.
  • It boosts productivity by increasing employee motivation and strengthening commitment.
  • It improves quality by promoting focused work and reducing waste
  • It lowers costs by reducing mistakes, accidents and absenteeism.

All this is based on a long historical development:

1907 - The story of the LED begins: The Englishman Henry Joseph Round discovers that inorganic materials can light under electrical voltage.

1935 - Georges Destriau discovered a light emission of zinc sulfide

1951 - A technical progress in semiconductor physics is achieved with the development of the transistor. Thus, the light emission could be explained. For now, scientists continue to zinc sulfide. In 1959, she then focused entirely on the production of light by semiconductors.

1962 - The first red light-emitting diode (type GaAsP) comes on the market, developed by the American Nick Holonyak. It marks the birth of industrially manufactured LEDs.

1971 - LEDs in the colors green, orange, yellow are developed as well as an improvement of the performance and efficiency.

80s to early 90s
Based on the new semiconductor material gallium nitride (GaN) Shuji Nakamura developed in Japan in 1993, the first light radiant, commercially successful LED blue and later a white LED

1995 - The LED is presented, the gains by adding white light luminescence of phosphors.
1997 - These white LEDs come on the market.

2006 - The first LEDs achieve a luminous efficacy of 100 lumens per watt. The efficiency of the LED has been further increased. LEDs are about to conquer virtually all lighting applications - and their development continues ...

McKinsey expects in a report of August 2012 that in 2020 70% of all branch relevant incomes will be generated by LED lamps.


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