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Posted by hallerb@aol.com on March 4, 2008, 6:23 pm
On Mar 4, 6:04=EF=BF=BDpm, d...@manx.misty.com (Don Klipstein) wrote:
> >becauseofj...@mailcan.com wrote:
> >> UV does have it's applications.
>
> >> However, It is expensive for the normal, low maintenance homeowner.
> >> UV does have a 1/2 life...
>
> >OK - The Honeywell products are not *that* expensive, and UV is used in
> >*many* water treatment systems and they are not that expensive... =EF=BF=
=BDUV
> >half-life? =EF=BF=BDNo. =EF=BF=BDYou mean a radioactive half life express=
ing the rate of
> >decay? =EF=BF=BDThat's like saying light has a half-life, or radio waves =
have a
> >half-life - they do not. =EF=BF=BDHalf life is an expression of the rate =
of decay
> >of a substance (or a biological system) - not the MTBF or service life of=
a
> >product. =EF=BF=BDMaybe you mean the phosphors that are used to create th=
e UV
> >radiation has a half-life?
>
> >All things wear out - UV bulbs included, but what I like about some of th=
e
> >the Honeywell units is that they can sense when the air is moving and the=
n
> >turn on - extending bulb life past the usual one year.
>
> =EF=BF=BD The UV bulbs for sterilization do not have phosphors. =EF=BF=BDT=
he glass/quartz
> does becoome a little less transparent to the germicidal UV as the bulb
> ages.
>
> =EF=BF=BD- Don Klipstein (d...@misty.com)- Hide quoted text -
>
> - Show quoted text -
many years ago hamilton gas dryers had these lamps. many years like
2nd world war
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