ISO-3664:2009 illumination
ISO-3664:2009 illumination
- Subject: ISO-3664:2009 illumination
- From: Roger Breton via colorsync-users <email@hidden>
- Date: Sat, 15 Jun 2019 15:27:08 -0400
I suspect this "old" GTI lamp was manufactured a long time ago.
https://1drv.ms/u/s!AkD78CVR1NBqkLRy3q1Y_l3gK8VkWg
I gather there is a code that identifies lamps that meet the new
specification.
Does anyone know what code I should be looking for?
One thing, though.
I found this lamp installed in an old GretagMacbeth overhead luminaires, at
a client, yesterday.
See the data here, in Excel (measured with Minolta FD-7) :
https://1drv.ms/x/s!AkD78CVR1NBqkLRz_XP0GZyvIEZh7w
The thing is, according to ISO-3664:2009, the light produced by these lamps
"shall" (or "should") have energy in the UV part of the spectrum. I'm not
sure they specify down to 360nm but that's typically where the optical
brighteners components in the paper are excited from, according to my humble
information. If the lamp does not produce any energy in that part of the
spectrum, hence, the appearance of the proof "will be compromised". (I hope
TC130 is starting to work on the new type of LED illumination which will
gradually replace Mercury-based fluorescent tubes, because it's going to
happen sooner than later.).
Just curious, for those who have long measured the "new" 2009 lamps, would
you have some kind of data to share? So that I can compare? GTI lights,
preferably.
Thank you / Roger Breton
www.graxx.
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