Re: solux bulbs
Re: solux bulbs
- Subject: Re: solux bulbs
- From: "Bertho Boman" <email@hidden>
- Date: Wed, 13 Aug 2003 12:12:33 -0400
----- Original Message -----
From: "Roger Breton" <email@hidden>
>
>
Guys,
>
>
I have many times measured the spectrum of the so-called 'rated 4700K'
with
>
my SpectroCam in Lux meter mode. I also measured its CCT with my trusted
>
Minolta Chroma meter and both instrument tell me that these bulbs do not
>
read 4700K as rated by the manufacturer. I get more like 4200 to 4400K.
>
(Bear in mind that I am not using the bulb in a black anodized desktop
Solux
>
lamp but in a 12V halogen housing that I have manually painted in matte
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black myself -- the desktop lamp was out of stock at the time I ordered
the
>
bulbs).
---snip
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Until I can ascertain why I don't get true 4700K CCT with this bulb I
won't
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use it for critical color proofing. To that end, I still use my trusted
GTI
>
D5000 Transparency/Print Viewer.
Roger,
The lamps are sensitive to the operating voltage as are all incandescent
bulbs. You need to verify that the voltage on the lamp pins are really what
it is supposed to be.
There is a chart available from Solux were you can pick the correlated color
temperature you want by adjusting the supply voltage.
For the above reasons, I run my Solux lamps off a DC adjustable and
regulated supply.
Remember if you hook up a supply, it got to be rated high above the steady
state current to be able to handle the initial surge current.
As you mention, the big advantage with the Solux lamps is that there is a
continuous spectrum vs. the spikes from fluorescents.
Bertho
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