4' Flourescent bulbs are readily available in North America with Colour
Rendition Indices up to 97 and Kelvins of about 5400 degrees.
Tom
On Saturday, December 15, 2001 at 11:07, C.H.Ling <olympus@xxxxxxxxxxxxxxx>
wrote re "Re: [OM] A trying test: One failure" saying:
> Yes, you are right, complex lighting are impossible to correct. On the other
> hand, area covered with one kind of fluorescent lamp can be partly corrected
> with FL-D or FL-W, which mainly reduce some green from fluorescent and
> compensate for the color temp.
>
> High color rendering index fluorescent lamp was available for a long time, I
> have used such lamp for years, which has an CRI of over 85% (the traditional
> one is 65%) and some special one is up to 90%. They look much better than
> the traditional fluorescent lamp and price is not much higher, I think it is
> worth to make a change not only for photography but good for the eyes too.
>
> C.H.Ling
>
> ---- Original Message -----
> From: "John A. Lind" <jlind@xxxxxxxxxxxx>
>
> >
> > Color balancing fluorescent light is much more difficult than incandescent
> > (tungsten) because it isn't just a "roll-off" in a region of the visible
> > spectrum. Fluorescent and most other gas discharge type lighting (mercury
> > vapor, sodium vapor, etc.) have significant spikes of specific
> wavelengths.
> >
> > Worse yet is mixed lighting that has lighting sources of different
> > types. Color balancing those situations can be nightmarish, often
> > impossible. Look at what you shot to see if there's a possiblity of mixed
> > lighting in them (daylight coming through windows, stage with tungsten
> > based lighting, etc.).
------- Quidquid latine dictum sit, altum viditur -----------------
,__@ Tom A. Trottier +1 613 860-6633
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