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Actual
coloured light produced, depending on
which materials are chosen. mix-
ture RGB (red, green, blue) also produces
white.95
The Lighting Handbook
Light emitting diodes (LEDs)
– Very efficient light production
– Wide selection standard ranges
– Can switched and dimmed required
– Very long service life
– Good very good colour rendering
– Very good production coloured light
–
Use: LEDs can used for both functional
and decorative lighting indoor and
outdoor locations.
Today, LEDs are already some the most
efficient light sources for general lighting. Their very long service life over
10000 hours demands optimised thermal
management order prevent overheating.
Functional description
Light emitting diodes are modern semicon-
ductor devices. The active semi-
conductor layer, which radiation pro-
LED lamp LED module
Board
LED chip
Bubble
Bonding wire
More information about LEDs can be
found Chapter Technology. 250 micrometre =
1 one thousandth millimetre).
duced, sandwiched between positive and
a negative substrate inside the LED. Their characteristics are
determin
ed their materials, mechanical
design and operating mode. Nowadays, high-
quality white light produced blue LEDs
with yellow luminescent substances. rule,
they are powered via appropriate convert-
ers.
.
They are completely superseding traditional
light sources many applications. The smallest LED chips have side
length approx
