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Any wisdom on how to tell when your Xe bulb is about to go?  I imagine same
stuff as Hg bulb.  Lower output due to deposits on glass,  visible film on
glass (I'd think this would be close to catastrophe), higher power draw due
to larger gap.  Any quantitative measures on these parameters or other
suggestions?


Chris Hunt
Research Chemist, Modified Lignocellulosic Materials

USDA Forest Products Laboratory
1 Gifford Pinchot Dr.
Madison, WI  53726-2398
Tel: (608) 231-9521
Fax: (608) 231-9262
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