What use such a high brightness as the standard?

DCI uses a base outdoor brightness of 16,000+ nits for product longevity. No one uses 16,000+ nits for operation, even in daylight hours. The inherent nature of LEDs is that they dim with age. A diode with a higher initial nit rating will stay bright and usable longer (especially when operated with the power saving features included in DCI signs). Display units use different diode specs for different applications. A 5,000 nit diode is a borderline indoor or low application outdoor. If the outdoor sign is designed with lower rated diode brightness, the years of service are compromised. DCI displays are designed to provide a maximum period of service with enough brightness to clearly present the media intended. The investment is too great for half life displays with a short amount of time.

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