Subject: Re: CVNet - reply (2) to query on easel lamps
From: "Mary A. Johnson, Ph.D." <mjohnson@umaryland.edu>
To: Color and Vision Network <cvnet@lawton.ewind.com>
I've always wondered if light sources for color vision testing aren't
incredibly over-specified, which is why they end up costing so much.
Has anyone performed a spectral analysis on "daylight" bulbs that have been
pitched to general consumers interested in the mood-enhancing effects of
natural lighting? In particular, there is a "chromalux" bulb manufactured
by Lumiram, available for about $8, that is proported to simulate natural
daylight.
Thanks.
----------
>From: Color and Vision Network <cvnet@lawton.ewind.com>
>To: CVNetList@lawton.ewind.com
>Subject: CVNet - reply (2) to query on easel lamps
>Date: Tue, May 16, 2000, 4:57 PM
>
>From: "Scott E. Brodie, MD, PhD" <brodis01@doc.mssm.edu>
>To: Color and Vision Network <cvnet@lawton.ewind.com>
>Subject: Re: CVNet - query; sources for easel lamps
>
>The MacBeth Easel Lamp went out of production in the late 1980's. (No
>wonder -- they were charging about $500 for this awkward, heavy
>cast-iron table lamp.) The key "magic" element, the blue glass filter,
>was available separately from MacBeth, but they have sold off the last
>of these, and they are no longer available either.
>MacBeth (as well as Munsell Color) is now a part of "GretagMacBeth" (see
>http://www.gretagmacbeth.com/index.html). They sell a large variety of
>carefully calibrated light sources, most intended for industrial
>applications.
>
>Perhaps their handiest product is the "Sol Source" Daylight Desk Lamp, a
>spring-counterbalanced articulated arm desk lamp, which provides a
>choice of three calibrated color-temparatures by means of a "filtered
>tungsten-halogen source." Over the phone, their sales rep confirmed that
>this is an approved light source for color vision testing, as for the FM
>100-Hue test. The price is $395; delivery takes is quoted as about 8
>weeks. I have no personal experience with this item.
>
>You might also try the "True Daylight Illuminator" available from Wilson
>Ophthalmic Corporation (priced at $286.12 in their 1999 catalog). The
>catalogue entry reads "... provides a light source rating of C.R.I 90
>and 6200 deg K, UL approved." This appears from the photo to be a small
>"Easel Lamp", with a shielded bulb housing which runs across the top; it
>holds a book of color-test plates nicely. Again, I have no personal
>experience with this item.
>
>Hope this helps.
>
>Scott.
>
>Scott E. Brodie, MD, PhD
>Mount Sinai School of Medicine
>New York
>
>brodis01@doc.mssm.edu
>
>
>Color and Vision Network wrote:
>
>> From: "Neil Parry" <nparry@fs1.cmht.nwest.nhs.uk>
>> Organization: University of Manchester
>> To: Hoover Chan <hchan@kirkham.ewind.com>
>> Subject: CVNET - Query on Easel Lamps
>>
>> Does anybody know the source of daylight illuminators
>> like the Macbeth easel lamp? I understand these are no longer
>> manufactured, but perhaps someone out there knows of a secret
>> supply, or a suitable alternative.
>>
>> Thanks,
>>
>> Neil Parry
>>
>> Replies to Neil.Parry@man.ac.uk
>
>
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