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    <div class="moz-cite-prefix">On 07/03/2015 10:19 PM, Bill Nelson via
      Stagecraft wrote:<br>
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      cite="mid:2535bd315aceb1351048071a49075897.squirrel@webmail.peak.org"
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        <pre wrap="">At least some lamps last longer on AC than DC due to ion migration.
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Differential tungsten evaporation from the filament?

Bill



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    <pre class="moz-signature" cols="72">-- 
Jerry Durand, Durand Interstellar, Inc.  <a class="moz-txt-link-abbreviated" href="http://www.interstellar.com">www.interstellar.com</a>
tel: +1 408 356-3886, USA toll free: 1 866 356-3886
Skype:  jerrydurand 
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