[opendtv] Re: LEDs shine as replacement for lightbulb
- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Fri, 16 Nov 2007 17:07:42 -0500
John Shutt wrote:
> I believe the problem with CFLs is the small amount of mercury
> put into the tube, not the phosphors.
>
http://www.npr.org/templates/story/story.php?storyId=7431198
John, you're strictly right, but I believe the mercury and the phosphors
work together, to convert UV into visible light.
http://www.epa.gov/mercury/consumer.htm
"Fluorescent Light Bulbs
"Mercury is used in the long fluorescent, compact fluorescent, and
high-intensity discharge (HID) lamps. Visible light is produced when the
mercury in the lamp is electrically energized."
These white LEDs work the same way. Thay too produce mostly UV, and need
to have it converted to white light. My guess is, they will also have to
use mercury, as all fluorescents have always done.
Bert
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