Page 51 - European Energy Innovation - Autumn 2015 publication
P. 51
Autumn 2015 European Energy Innovation 51


electric technologies to produce more efficiently energy into phenomenon discovered in
light. His ‘arc lamp’ produces light useful light than incandescent the early 20st century called
thanks to an electric arc which is a lamps. Eventually, the first LED ‘electroluminescence’. The first
discharge that occurs when a gas technologies appeared thanks LEDs were quite useless for
is ionized. In the early 1920, the to Nick Holonyak in 1962 which lighting purposes as they emitted
long lasting incandescent light predicted that LEDs would later low-intensity infrared light. It’s
bulbs superseded the arc lamps replace every incandescent lamps only in 1962 that Nick Holonyak
thanks to successful inventor of old Thomas Edison. build a first visible-light LED.
Thomas Edison. Light is emitted Also of low intensity, the LED
by incandescence thanks to a wire The advent of LED technology was limited to red colour but
filament heated by an electric LED which stands for Light- already replaced most of small
current and protected from Emitting Diode is composed incandescent bulbs in electronic
oxidation with a glass bulb filled of two semiconductor devices.
with inert gas. Incandescent lamps materials that emit light
correspond to our traditional thanks to an opto-electrical Today, LEDs offer very high
lighting. Of low manufacturing
costs, incandescent lamps are The Reform Club is both internally and externally of one period and is one of the
produced in a wide range of size most important buildings in London dating back to the Victorian period. A visit
and luminosity. At the middle to the Reform Club is a special experience even today. The primary goal of the
of the 20st century, fluorescent lighting solution was to add life, excitement and vitality and provide the ‘eyes’
lamps appeared. More costly, through which to the Victorian-age building’s charisma and provide a pleasant and
they have the benefit to convert unforgettable atmosphere for both visitors and staff, while at the same time meeting
conservation and energy requirements.
   46   47   48   49   50   51   52   53   54   55   56