Originally posted by: funboy42
How long does a plasma tv or or lcd last? Are they both powered by a light bulb and if so I heard that they are expensive to replace is that true?
Im lazy to google havent gone to bed

tired and seeing stuff.
A long LONG time. If you can wear out a modern, reasonably high quality plasma or LCD (wear out by use, not by stupidity), you're seriously watching way WAY too much TV.
WARNING: Wildly unpopular facts ahead. Skip if you're uncomfortable.
CURRENT generation top tier plasmas have a 60,000 hour halflife. The halflife is the time it takes to reach 1/2 brightness. At 1/2 brightness, most of these plasmas will still be much brighter than your typical tube TV. For reference, if you watch 10 hours of TV a day, 7 days a week, every single week of the year, it would take over 16 years to reach half brightness on a plasma. There is no replaceable bulb.
It's also much MUCH more difficult to burn in a plasma these days. Burn in is tied to plasma halflife, so these new 60k hour panels are much better than the older 10, 15, 30k hour panels. This being said, it still is possible to experience burn in if you're seriously almost criminally stupid.
Current LCD's last between 50k to 60k hours. They're EXTREMELY hard to burn in, though this can happen as well. The brightness drop-off IS FASTER on an LCD than a Plasma, even with the latest and greatest long life CCFL's (NEC makes some of the best on the market).
Backlighting is, in theory, replaceable on some LCD's. However, doing this is more expensive than simply buying a new LCD TV, so no one does it.