Compact Fluorescent Lamps [RE-wrenches]

[Joel Davidson]

<x-flowed>

I'm still searching for a CFL replacement with >80 CRI for 50/100/150-watt 
3-way bulbs.

July 2007 issue of Electrical Wholesaling (available free to the trade at 
http://ewweb.com/ ) has an article about the switch to CFLs and a sidebar 
about the proposed federal "Bright Tomorrow Light Prizes" of $10 million to 
whoever can replace the 60W incandescent with a light source that:
produces <1200 lumens
>150 lumens/W
>90 CRI (color rendering index)
2,800 to 3,000K temperature
>25,000 hours life.

Article tip: Take a long-tube 3,000K tri-phosphor fluorescent, and put a 
filter called "warm straw" on it to match incandescent color.

Lastly, the article says replacing incandescents in the US will eliminate 
the need for 80 coal-fired plants, but I prefer telling people that if each 
household replaced 4 incandescents with CFLs, 10 nuclear power plants could 
be shut down.

Joel Davidson

----- Original Message ----- 
From: "Doug Pratt" <dmpratt at sbcglobal.net>
To: <RE-wrenches at topica.com>
Sent: Monday, July 16, 2007 9:50 PM
Subject: RE: Compact Fluorescent Lamps [RE-wrenches]


>
> Joel,
>
> There are really only two scientific rating systems for light color and
> quality.
>
> Degrees Kelvin describes the light color. Lower numbers, 2700 to 3000 are
> rosy-yellow and mimic the standard 60-watt incandescent bulb most of us 
> grew
> up with. 5000 to 6000 is bluish, more like direct sunlight. These bluish
> bulbs make good reading lights, but they make people look like the night 
> of
> the living dead (IMHO).
>
> The Color Rendering Index (CRI) is a measure of how closely the light 
> mimics
> actual noon sunlight by rendering colors accurately. On the CRI scale 100 
> is
> noon sunlight, 0 is a cave. Lights with a CRI of 80 or better are pretty
> nice all around. 90 or better is really great, but hard to find in a
> fluorescent. Your typical 4-foot cool white tube has a CRI of 62. "Warm
> white" fluorescents rate about 52, which is why you found your cheap cfl 
> so
> unpleasant. Many fluorescent manufacturers don't list the CRI for their
> lamps, which leads me to think they're probably well under 80. (They suck 
> in
> other words.)
>
> The major manufacturers DO list all this info in their lamp catalogs.
>
> Cheers,
> Doug Pratt
> DC Power Systems


- - - -
Hosted by Home Power magazine

To send a message: RE-wrenches at topica.com

Archive of previous messages: http://lists.topica.com/lists/RE-wrenches/read

List rules & how to change your email address: www.mrsharkey.com/wrenches/etiquette.php

Check out participant bios: www.mrsharkey.com/wrenches/

Moderator: michael.welch at homepower.com
--^----------------------------------------------------------------
This email was sent to: michael_welch at sbcglobal.net

EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Qcs.bz9JC9.bWljaGFl
Or send an email to: RE-wrenches-unsubscribe at topica.com

For Topica's complete suite of email marketing solutions visit:
http://www.topica.com/?p=TEXFOOTER
--^----------------------------------------------------------------



</x-flowed>