What's the difference between total hours and backlight hours contained by an LCD monitor? How is lifetime related?

How is the lifetime related to these parameter? What is the average lifetime of a brand name LCD monitor? Thank you for your give support to.

Answer:
The LCD/TFT array and the cold cathode fluorescent backlight have different working life span expectancy and failure characteristics. The individual LCD elements most probably founder individually giving a slowly degrading image. The backlight usually fail over a short period of a few months closing moments in total disaster. The CCF average working life is 10,000hrs, The LCD array may second 3-5 times longer

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