Hi Paul:
LEDs come in many flavors of white. The ones called warm white can be
very comfortable but they are not as bright as the plain white or cool
white LEDs.
Also high power LEDs can burn your eye. Not because they emit UV but
rather just because they are bright, like the Sun.
http://www.prc68.com/I/LED.shtml#Atlas This is a 7 Watt LED that burned
my eyes.
Wien's displacement law relates the wavelength emitted from a hot body
to it's surface temperature. For numbers for the Sun or a human see:
http://www.prc68.com/I/Probeye.shtml#WaT
Planck's law took another five years to relate frequency and surface temp.
Have Fun,
Brooke Clarke
http://www.PRC68.com
paul swed wrote:
IKEA and $39 per lamp. Sounds like some pretty good margin in the sale.
I guess these LED things will be main stream and save the world when we see
them at walmart for $6.
On my bench I converted to 60 watt halogen lamps compared to the 100 watt
lamp.
Equivalent color spectrum to the traditional lamp also. For as many hours as
that light is on. I suspect I am saving some money in the long run.
Curious are these lights truly white or do they tend towards a traditional
lamp spectrum.
Regards
On Sat, Jan 30, 2010 at 8:15 AM, Didier Juges<did...@cox.net> wrote:
Yes, it is frustrating, they have to be the last dinosaurs of consumer
distribution.
For me, the nearest store is 6 hours away, if I don't get stopped for a
speeding ticket on the way...
So I can't afford to be interested in what they may have for sale.
Didier
-----Original Message-----
From: time-nuts-boun...@febo.com
[mailto:time-nuts-boun...@febo.com] On Behalf Of Brooke Clarke
Sent: Friday, January 29, 2010 3:07 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] [OT] Ikea Lamp
Hi David:
Thanks for the link. I like them. The only problem is that
you can not order on line or by phone from Ikea and the
nearest store is over two hours drive away.
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