Halogen projector bulbs

[P3D Linda Nygren <lnygren@xxxxxxx>]

I have a TDC 716 projector, and wondered whether it would be advisable
to replace the bulbs with halogen ones, when the current 750W bulbs go
if not before. Dalia apparently sells a 500W bulb (13,000 lumens, 100
hour life) to replace the CZX 500 normally used in the TDC 116 and other
projectors. Nothing mentioned for the TDC 716 (which normally uses the
DDB 750) in the catalog I have. Does the 500W halogen just improve light
output of a 116 to be to be more comparable to the 716? I hear that the
projector is supposed to run cooler, although I don't understand why
this would be the case with comparable wattages to generate the heat.
Also, I thought there was a recent posting that mentioned using  250W
halogen bulbs. Does anyone know how the light output of the 500W halogen
compares to the old 750W? Are there any disadvantages to "halogenizing"?
If 250W halogens would be suitable, is there a good source for them?
Thanks for your help. -Linda


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