The incandescent light
bulb was downright
amazing when it was
invented in 1809
by Humphry Davy

Keep
clicking

L.E.D.’s.Lights

Because they use less power than
standard incandescent bulbs,
white LEDs have become common in
flashlights

The light bulb has been running
out of friends recently
Australia is
banning them
in 2010
California and
Canada have
decided to ban the
sale of incandescent
bulbs by 2012
A U.S. Senate committee is
working on a proposal that would
phase out the light bulb in
10 years
The European Union is
looking at banning them

And in New Jersey, where
the first practical
incandescent bulb
emerged from Thomas
Edison's laboratory
in , a bill has
been introduced
to ban their use in
government buildings

Banishing the dark gobbles up
of the electricity generated in
the United States
Widespread use of LED lighting could
cut consumption in
Source: U.S. Department of Energy

almost all of this electricity
creates rather than light
a typical 100-watt
light bulb radiates
roughly 95 watts
into its surroundings
as

By 2027, LED lighting could cut
annual energy use by the
equivalent of
with the attendant reduction in emissions of carbon dioxide
the gas believed to be responsible for global warming

The absence of a filament
and its surrounding
vacuum-containing bulb makes
LEDs extremely durable
and eco-friendly
That’s
GOOD!

LEDs have another
big advantage
of service
Not having to send out janitors to replace burned-out
bulbs means big savings in maintenance costs

What holds it
back is chiefly
their price
but LEDs are already
an economic
alternative for niche
uses
I’ll
show an
example

Wal-Mart Stores Inc. is putting LED lighting in its
in-store refrigerators, where the cold dims
fluorescents and incandescents produce
too much heat
That is a
nice niche
use!

A high-end 10-watt LED
light bulb currently costs
just under $100. It replaces
an incandescent 100-watt light
bulb that typically costs
around $1. So at first, the
10-watt LED light seems to be
$99 more expensive
Yep! that’s
expensive!

For applications in places where
dealing with a burned-out bulb
can pose a serious safety
concern--cost is a minor
consideration

Major lighting
manufacturers
Spurred on by the
federal Next
Generation Lighting
Initiative
have formed consortia with semiconductor
producers to mass-produce LEDs

By some estimates, white-light LEDs
could capture a quarter of the
existing incandescent and
fluorescent lighting markets as
early as 2012

The cost of
LED lighting
should be
coming down
quickly!

“The cost of individual
white-light diodes, several
of which go into an LED
bulb and make up much of
the cost, have come down in
price from about $8
to $1.50 in a year.”
\"LEDs, good or bad, will be
growing very rapidly.\"

As in the microelectronics
revolution, many of the
possible applications for
LED’s will occur in ways
that have not yet
been envisioned

But one thing is
for sure LED’s are
more eco-friendly and
don’t contribute
with