🚀 go-pugleaf

In article <10040@pasteur.Berkeley.EDU> charless@cory.Berkeley.EDU writes:
}In article <16120020@col.hp.com> dunphy@col.hp.com (Dan Dunphy) writes:
}>>/ col:sci.electronics / schuster@cup.portal.com (Michael Alan Schuster) /  4:41 pm  Nov 29, 1990 /
}>>
}>>What's the principle behind the "krypton" flashlight bulbs being sold
}>>now, and market as "70% brighter" than the standard type?
}>>----------
}>I suspect they use a principle similar to halogen. I just
}>tried my first. They are a lot brighter.
}
}I don't know if Krypton bulbs use a halogen cycle too, but the idea of the
}krypton is that it is a heavier gas than the usual fill gas, and so retards
}the evaporation of tungsten more, and I think has lower thermal conductivity.
}You can take the benifits of this as longer life or higher efficiency, depending
}on what temperature you design the filament to operate at.

Xenon is even heavier, and has the additional advantage of being a lot
cheaper.  So where does that leave your argument?

-- 

Norm Strong  (strong@tc.fluke.com)
2528 31st S.   Seattle WA 98144