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I've been using HBO 100 W s, for about 30 years, and have had 2
explosions in that time, one long ago and one approx. 3 yrs past.  Both
could be attributed to a high number of on off cycles (something I
discourage).  I nomally cycle a bulb no more than twice a day, and need
to relamp about every 40-45 days in a busy lab with 3 fluorescent
scopes.  We always replace at 200 hrs. the cost of the bulb is small
compared to the damage to the equipment and time and cost of
decontaminating the microscope rooms.

Russ



Russell N. Spear
Sr. Research Specialist
Dept. of Plant Pathology
Univ. of Wisconsin
1630 Linden Dr.
Madison WI 53706

voice 608.263.2093
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