Basic
Concept
LED
will become an important light source without doubts. Because higher
electric-optical efficiency has been achieved then previous estimation,
and accelerating. A year 2003 prediction said 100 Lm/W product would
be delivered at year 2008, now it will be in the market next year.
Why
the efficiency is so important? Because the average efficiency is
around 20 Lm/W for Halogen lamp, and it’s 80 Lm/W for FLUORESCENT
LIGHTS. Next year we can see the efficiency of LED will pass over
the efficiency of those common general light sources. That suppose
to mean people can utilize energy more efficiently from a better light
source.