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Compact fluorescent lamp life
I bought a pair of Panasonic 96w cf tubes from AHSupply in Dec.
1999. This month one of them failed. They have been running about 10-12
hours per day split over two light periods per day (afternoon
thunderstorm). So that is about 8000 hours when the first tube failed.
But the surprising thing was that when I replaced the failed tube I would
estimate the replacement was 2 stops (4x) brighter than the remaining
original. I thought someone had written that cfs didn't dim much, run
them till they die. Well I can tell you that with 5 hour on periods, they
dim a lot in the first 8000 hours.
If you have older pc tubes, you should maybe get a replacement set and
replace one. See if it makes a big difference in the brightness. If it
does, you can keep the old faded one as a spare.
And many thanks to AHSupply for the great replacement service, 2 days from
order to receipt! And the best prices!
--
Dave Gomberg, San Francisco gomberg at wcf dot com
http://www.wcf.com/co2iron for low cost CO2 systems that work!
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