The panels themselves can last a significant amount of time, up to the number you specified. The numbers you noted are actually more in your favor, considering most stores turn off their electronics at night.
Naturally, this isn't to say that things can't go wrong, or that other components besides the LCD don't age - or couldn't malfunction over time, but all things considered, getting almost half off the retail price for less than 10% of the life of the TV is still a pretty good value; at least, I think most people would agree.
Whats the estimated lifespan of a flat panel? purchased a floor model from a retailer - LN46A850 for $700 including tax. I thougth it was quite a bargain considering the TV sells new for about $1,300.
My question is - assuming that the TV was on 12-24 hours a day (the sales guy says it was on for 12 hours a day) - whats the expected life of the TV?
If the 100,000 hour life span is normal for this TV and 24 hrs x 365 days = 8,760 hours (it was mounted on the wall for one year) - can I assume that there is approximately 91,240 hours left of life? Approximately how many years of normal usage is left on the TV?