help with ambient light levels?

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2 total messages Started by Jim Curran Wed, 23 Sep 1998 00:00

#56

Author: Jim Curran
Date: Wed, 23 Sep 1998 00:00

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I hope someone here can help me. I am an ergonomist who has not worked in
the field in several years. I work in an office where the light levels
strike me as too high, and I need to provide justification to get them
changed.

I wonder if anyone has the most current recommendations for ambient light
levels for VDT use (& citations).

Also, how should I measure the light level? Is a standard photography light
meter sufficient, or do I need a fancy photometer?

Thanks in advance for any help you can provide.

Jim Curran
3Com Corp.
jim_curran@mw.3com.com

Re: help with ambient light levels?

#57

Author: J. Maxwell Legg
Date: Thu, 24 Sep 1998 00:00

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Jim Curran wrote:
>
> I hope someone here can help me. I am an ergonomist who has not worked in
> the field in several years. I work in an office where the light levels
> strike me as too high, and I need to provide justification to get them
> changed.
>
> I wonder if anyone has the most current recommendations for ambient light
> levels for VDT use (& citations).
>
> Also, how should I measure the light level? Is a standard photography light
> meter sufficient, or do I need a fancy photometer?
>
> Thanks in advance for any help you can provide.
>
> Jim Curran
> 3Com Corp.
> jim_curran@mw.3com.com

In my pre internet days back in 1994, I read a paper put out by a Blain
Stowkoski who was then head of the British Columbia Ophthalmic
Association. This paper dealt with exactly what you're looking for. From
memory he talked about a 10% reduction of light from behind and a 20%
reduction of light in front as measured by the screen's light or
something along those lines; - but don't quote me as I'm only guessing
at what was written. I can't find him on the net but his office was in
Westminster BC and he should still be in the phone book. I met with him
to discuss the effect of mind machines on the eye. After careful thought
he said they would be a good exerciser for the retina.

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