Pat,
I've noticed that American bulb manufacturers are telling consumers to shift
our thinking from watts to lumens for the degree of light. Did they make up
another term to avoid using a metric unit?
Norman
----- Original Message -----
From: Pat Naughtin
To: U.S. Metric Association
Sent: October 24, 2010 03:34
Subject: [USMA:48705] Re: flash light standard
On 2010/10/24, at 06:31 , m. f. moon wrote:
I recently bought a new mini maglite led flashlight marked with a set of
parameters labelled FL 1 Standard. These parameters were all in metric and
included "243 cd, 31 m, 9 lumens, 1 m" . I found by google search FL 1 standard
the new standard from NEMA which defines all of this and more. Some surprise to
me -- so look it up it is interesting.
m moon
Thanks for the reference Marion,
I found this YouTube site to be a good explanation for the light unit naive
(like me): http://www.youtube.com/watch?v=aO_l5ciKsPg
It's not all metric but clearly they are heading in the right direction. (But
I was a bit worried about "light energy" being measured and quoted in "lumens".
When I think energy I think joules!)
Cheers,
Pat Naughtin
Author of the ebook, Metrication Leaders Guide, see
http://metricationmatters.com/MetricationLeadersGuideInfo.html
Hear Pat speak at: http://www.youtube.com/watch?v=_lshRAPvPZY
PO Box 305 Belmont 3216,
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