Re: Do SoLux bulbs meet color temp specs?
Re: Do SoLux bulbs meet color temp specs?
- Subject: Re: Do SoLux bulbs meet color temp specs?
- From: Andrew Rodney <email@hidden>
- Date: Mon, 01 Jul 2013 10:41:02 -0600
>> My own measurements and information supplied by SoLux and the Intertek test
>
>> lab indicate that SoLux bulbs meet their color temp spec within +/- 200K.
On Jul 1, 2013, at 10:07 AM, Nipat Paiboonponpong <email@hidden> wrote:
> I remember I measured it with Eye One Display 2 long ago and felt a bit disappointed
> (I didn't know what to expect then). It read 4400-4500K, I had got the 4700K ones.
This was discussed in some lenght back in Feb of 2009 on this list. Franz who asks was provided the posts by Robin Myers and Tim Vitale who both posted very close values that didn't match the spec's! In fact, Robin used a very expensive spectroradiometer along with an i1Pro like Tim and the values they produced were rather close. When this was presented to Franz who asked about this on PhotoNet his reply was (and I quote): "Next, measuring SoLux CCT numbers. There are a lot of wrong ways to measure them and I'm pretty sure the two gentlemen you refer to are doing it wrong". Franz has posted this question to three sites** and has been given the same answers: No, the CCT values don't match what the spec suggests and he will never be satisfied until he hears what he wants to hear.
Further, last week I measured my Solux CCT 4700K bulbs within a Solux supplied task lamp (such that Franz could not say it was a 3rd party housing that caused the numbers he doesn’t what to hear). I used the newer i1Pro-2 and BabelColor CT&A, the results were again very close to Tim and Robin's (4312K) which Franz equally ignored.
Best thing to do is ignore Franz as he's not interested in hearing anything but what his 10 year old Minolta Color Meter showed: a value within CCT 50K of spec. I tried to explain his device is far, far from ideal but, he isn't interested in hearing any facts based on science let alone colorimetry. He's sure the Solux numbers are correct and when shown they are not, suggests anyone who presents them contact Solux to learn what they did wrong. If you read any of his posts, it becomes quite clear he's a flat-earther. I don't think we'll hear from him here fortunately as he's decided to remain silent on the other two forums after having his behind handed to him <g>.
It WOULD interesting to hear from Solux who is also posting an article by him and haven't said anything about the discrepancies in CCT values. That said, who cares (besides Franz)? The output of the Solux bulbs are lovely and the numbers reported don't mean very much anyway.
** Franz's rants:
http://photo.net/digital-darkroom-forum/00bjDL
http://photo.net/digital-darkroom-forum/00bkvN
http://www.luminous-landscape.com/forum/index.php?topic=79604.40
Andrew Rodney
http://www.digitaldog.net/
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