Cold cathode fluorescent (CCF) lamps are the most commonly used backlight sources in LCDs. In industrial Monitors applications, CCF backlight typically have a lifetime of at least 50,000 hours, or a half-down of brightness compared to new ones. In many consumer applications, the time required for the backlight to drop to half its initial brightness requires only 10,000 hours.
Since consumer applications do not require monitors to continue to work, 10,000 hours of CCF backlight life is sufficient, but not in most industrial and medical applications. The lifetime of the backlight is very low compared to the lifetime of the LCD. People are working hard to double the life of backlight, but in most industrial display applications, a minimum of 50,000 hours of life is considered the life standard for CCF backlight.