We don’t have actual mean time between failures (MTBF) calculations for our display modules. However, the gating item will always be the LCD panel backlight. For example, the panel used in the 4.3″ modules has an LED life time minimum rating of 20,000 hours, typical 30,000 hours. This LED life time is defined as the operating hours at full brightness until the module brightness decreases to 50% of the original brightness when operated at an ambient temperature of 25ºC. Note: This is not as bad as it might seem. Our eyes have a logarithmic response to brightness, so half bright to a luminosity meter is not perceived as half brightness. Note: The LED life time can be increased by reducing the display brightness or by turning the backlight off during periods of inactivity. For example, to double the LED life time rating, reduce the backlight brightness to 50%.