On 1/25/2013 11:22 AM, Bill wrote:
In , says...

In another thread, it was mentioned that CFLs and LEDs
last longer than incandescent bulbs.

We all know incandescent bulbs fail due to the filaments
being made so thin that they oxidize and burn up, over time.

But, what causes CFL bulbs to fail?

And, what causes LED bulbs to fail?

Greed on the part of the manufacturers (for all light bulbs which do not
last long). The bulb burns out, you buy a new one and they make more
money!

This bulb has worked for over 110 years...
http://en.wikipedia.org/wiki/Centennial_Light


It is easy to get an incandescent lamp that has very long life. Just get
a 240V bulb and use it on 120V. It will last nearly forever. But you
won't get much light out of it. That is what "long life" bulbs do. There
is a trade off of bulb life and light output. What is the light output
of the Centennial and other long lived bulbs in this thread?