RPTVs are projectors in a box with replaceable lamps. 8000 hours has been quoted to me. My LCD panel manual says 60,000 hour life expectancy. Does that include the lamp? Assuming 4 hours a day viewing, you do the math.
To be fair, at the end of the backlight life, you might be screwed but in the OEM game of LCD, replace a backlight is quiet the cottage industry. Watch the new generation of TV repairmen to replace backlights. They really are not that hard to put in. It is just that they haven't failed yet.
AND, when you consider that 60K+ hours is about 15 years of use, when and if they fail, do you really want to fix them or do you just want to buy a new set.
Some LCD displays (eg, some Sharp) have user-swappable backlights. In any event, replacing a backlight is not the hardest repair in the world, it is pretty common on laptop computers. Getting a replacement lamp with exactly the same color properties might not be trivial in 15 years. - DR
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