Re: RE: C50 vs. Vita lites

[busko at stsci_edu (Ivo Busko)]

"Ashcraft, Bob" <BAshcraft at medrad_com> wrote:
<snip>
> I also have Chroma 50's and Phillips Colortone 50's side by side and the
> Chroma's look gray compared to the Colortone's.  The Colortone's seem to
> retain their intensity for a longer period of time too.  If I remember
> correctly, they cost the same.  In fact the last time I bought tubes, I
> ordered Chroma's and they substituted the Colortone's for some of them.

The spectral plots I have for the Chroma 50 and the Colortone 50 are
identical. The difference you see is likely due to a difference in 
brightness only. Maybe tubes with different ages ? The color and brightness 
responses of the human eye are somewhat interdependent.

-Ivo Busko
 Baltimore, MD

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