RE: GBlist: Flourescent Fixtures/Bulbs

["Matt Duston" <mountainsun@pcisys.net>]

sorry if i'm getting off the track of the original post on residential
fixtures, but it all got me thinking.  i have heard that the new "standard"
in energy efficient lighting will be T5 lamps.  as far as i have seen, they
may not be the easiest thing to switch to, since they have smaller pins and
won't fit in a T12 or T8 fixture.  plus aren't they only available in 220V?
anyone out there who has some direct experience in using these bulbs?

Matt Duston
The Catamount Institute
www.catamount.coloradocollege.edu
719.687.0929

Sustainability...Science...Systems...Service...Spirit...Stewardship

-----Original Message-----
From: owner-greenbuilding@crest.org
[mailto:owner-greenbuilding@crest.org]On Behalf Of peter carlin
Sent: Wednesday, January 31, 2001 3:32 AM
To: bergman@cyberg.com; greenbuilding@crest.org
Subject: Re: GBlist: Compact Fluorescent Residential Fixtures?


I recently purchased my first CFL in a number of years.  It is a 20W
Phillips Marathon/Universal SLS/20.  It has a CRI of 82, 1200 lumens and a
CCT of 2700K.  I am using it over my desk.  My opinion is the light is too
"green", and I'm wondering if this is the CRI or CCT?  Or could it be the
shade (the fixture was designed for incandescent)?

I'm considering purchasing a number of surface mount fixtures (e.g. the main
kitchen light) and looking for opinions on F32T8 bulbs.  Based on the NLPIP
website (www.lrc.rpi.edu) reports, I'm leaning towards Phillips.  Does
anyone have experience with Phillips F32T8/ADV830 bulbs?  With F32T8/TL930
bulbs?  The latter have CRIs of 95, but the lumens/watt is down around 35
(instead of incandescent 15 or normal fluorescent of about 70).

I really wish there was a store in my area that had high quality fluorescent
bulbs on display so I could compare.  Home depot, even specialty lighting
stores, just have old F40T12 4100k, CRI70 lamps, which needless to say look
awful.

Peter


From: David Bergman <bergman@cyberg.com>
To: greenbuilding@crest.org
Subject: Re: GBlist: Compact Fluorescent Residential Fixtures?
Date: Tue, 30 Jan 2001 15:00:55 -0500

deb lombard wrote:
>I personally don't like the color of light that comes
>out of a CFL. I will always use Chromalux Full
>Spectrum in my home light fixtures and only have one
>light on at a time.
>
>Debra Lombard

That gets into a whole other (and highly subjective) debate about light
color. There are, for instance, fluorescent bulbs with a "better" spectrum
than some incandescents. And true daylight  -- a.k.a. full spectrum --
looks surprisingly cold, especially when compared to incandescents.

Also, I think SAD lightsources use full spectrum fluorescents, but those
are tubular fluorescent, not CFL.

The approach I try to use is diffusing the light through a shade, usually a
shade which warms up the color. and hides the glare of the bulb which tends
to be a bit harsh.



David Bergman
David Bergman Architect/Fire & Water Lighting + Furniture
bergman@cyberg.com    http://www.cyberg.com
t 212 475 3106    f 212 677 7291

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______________________________________________________________________
This greenbuilding dialogue is sponsored by CREST <www.crest.org>
BuildingGreen <www.buildinggreen.com> and Oikos <www.oikos.com>
For  instructions send  e-mail to  greenbuilding-request@crest.org.
______________________________________________________________________

______________________________________________________________________
This greenbuilding dialogue is sponsored by CREST <www.crest.org>
BuildingGreen <www.buildinggreen.com> and Oikos <www.oikos.com>
For  instructions send  e-mail to  greenbuilding-request@crest.org.
______________________________________________________________________