On Sun, 16 Jul 2006 08:42:26 -0500, Bob Adkins
wrote:

On Sat, 15 Jul 2006 21:34:46 GMT, "C. Massey" wrote:


They why does my employer change out the fluorescent lighting about every 5
or 6 years even when they are all burning good? When they do, the rooms are
so much brighter. Makes a huge difference.

I'm betting the replacement was wasted. That's because the lamps were
changes individually as they failed. In other words, the average age of the
tubes they were changing out was far less than 5 years!

I have 14ea 48" tubes in my home, shop, and garage, and I'll bet the average
age is less than 2 years.


It is NOT out of the ordinary in commercial and institutional use, for
QUALITY tubes to last more than 3 years, and changing en mass before
failure is standard maintenance procedure. If maintenance needs to
change more than a few tubes before scheduled change-out, they either
modify the changeout schedule or find a new supplier!!!!!!!
5 years MIGHT be stretching it, but I know on office where in the last
5 years only 2 or 3 bulbs had been replaced (along with about 4
ballasts) before a mass relamping and reballasting took place.

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