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Re: Lamp Life

>Date: Thu, 19 Mar 1998 11:37:59 -0800 (PST)
>From: Jim Spencer <jimsp at yahoo_com>
>For the 40W
>T-12(F40/D865), which has a rated life of 20,000hrs, this works out to
>1.8 years if you run your lights 12hrs/day. I guess this means we
>could use these lamps at least 18 months before replacing them.

I believe that the rated life numbers are based on *continuous* use (never 
turned off for 20,000 hours).  On/Off cycles reduce the lamp life.  You might 
try looking for fine print in the catalog to verify this. 

George Booth in Ft. Collins, Colorado (booth at frii_com)
Need Info?  http://www.frii.com/~booth/AquaticConcepts.htm