On Sun, 8 Apr 2007 19:52:26 -0500, "Anthony Fremont"
Gave us:

I suspect that on the display board they were
actually seeing a bit less voltage than it normally would installed, and
under allot better conditions. It's just that 12 hours per day operation in
a static display is an outrageously heavier than normal duty cycle.


Wrong. LEDs are CURRENT driven devices, and the display was most
likely being driven with too much current.