Re: LCD projection lamp life

The idea of an average rating for a projection lamp is not very
meaningful. Individual lamps are rated by the OEM and the manufacturer of
the set for some average life expectance, but these ratings vary greatly,
from 1000 hours to 8000 hours. It is difficult to discuss the matter
without some context such as the specific set or lamp.

I'm sorry, but that is exactly what "average" numbers are used for. If 90%
of the lamps being manufactured on Earth have a lifespan of 2000 hrs, 2%
have a lifespan of 8000 hrs, and 8% have a lifespan of 5000 hrs, you can
safely say that the average life expectancy of a lamp (WITHOUT getting into
particulars) is 0.9 * 2000 + 0.02 * 8000 + 0.08 * 5000 = 2360 hrs. This is
how statistics are built by the way. If you dwell into the details like
specific set or lamp, you are narrowing it down so much that the term
"average" makes no sense anymore - you are then talking about manufacturing
tolerance for that particular make/model, which is a totally different
issue.

By the way those numbers above are just an example but consistent with what
I hear from other people; I heard lots of complaints about lamps being done
or very low in brightness after only 1500-2500 hrs, and very few claims of
people getting more than 4000 hrs out of their lamp. I mean, heck, even if
you run a search in this newsgroup - see what kind of numbers others are
posting. Of course there will always be manufacturers with better products,
better lamps etc but that doesn't mean they are "average"



.

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