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T-8 lamp and ballast questions
I’m trying to understand the T-8 electronic ballast
information in the archives and on the manufacturers
web sites. My intent is to update my numerous shop
lights to T-8 tubes with electronic ballasts for more
bang for the buck. I don't really need more light
than the shop lights produce, I'd just like to cut the
electricity bill and possibly extend the useful lamp
life (bulb cost per year). With that in mind;
1. Sylvania's website indicates that their .88-.90
ballast factor units provide a 30-40% cost savings
over 40 watt T12 bulbs. In generic terms, how does
the light output of a 32 watt T-8 with electronic
ballast fixture compare to cheap shop light T-12 40
2. From somewhere in the archive, paraphrase... T-8s
don't degrade as quickly as T-12s. It isn't necessary
to do a T-8 bulb replacement on a 6-12 month
schedule. Is this true?
3. Jamie Johnson asked in 1999 “It seems the instant
starters produce more lumens/watt, but with a
reduction in lamp life, which is ok, I change every 6
months…” His question wasn't answered as far as I can
tell from the archives. Do the instant starters
produce more lumens/watt? Is it significant?
4. Where can I buy the ballasts on line and who has
the best prices?
5. Just out of curiosity, has someone already done
the legwork of finding the cheapest .88-.90 electronic
ballast for either a two or four bulb model from an
Thanks in advance for any comments/answers.
newellcr at yahoo_com
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