Surprise! (TDC image brightness)

[P3D KENNETH LUKER <KLUKER@xxxxxxxxxxxxxxxxxxxxxxx>]

> Well, I did my measurements and concluded that the 750W bulbs
> are *not* brighter than the 500W bulbs in my TDC 116 projector....
>
> when I replaced the 750W bulbs in my projector with the 500W bulbs
> I measured the same light output, 6.2EV w/ASA 100.
> 
> At the end I do not know why the two sets of bulbs are giving
> the same light output even though one is rated higher than the
> other...  This being the case, it is better to use the lower
> wattage bulbs which are less demanding on the projector, slide
> and electric bill!

George, thanks for your honest posting of data that seems to 
contradict what might have been expected.  That's a mark of an open-
minded scientist!  

Ken Luker
 _______________________________________________________________

Kenneth Luker, Assistant Director
Systems and Technical Services
Marriott Library
University of Utah
Salt Lake City, Utah
KLUKER@xxxxxxxxxxxxxxxxxxxxxxx


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