In article ,
Jeepers wrote:

alt.caving may have something, it's been a while tho.
spelunkers are messing with these things too.

If not, I'll be paying attention to answers here :^)


One more brand new device :-)

http://www.lumileds.com/pdfs/DS45.PDF

700mA: 70% lumen maintenance at 50,000 hours
1A: 50% lumen maintenance at 20,000 hours


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