There seems to be some confusion regarding tritium replacement cost so I called Trijicon to get the skinny. I forgot to ask them but i read elsewhere that they do a brightness test and if it is within replacement specifications and under warranty the replacement is free.
Accupoint........................$100.00
Compact ACOG 1.5-3.0.....$262.00
......................3.5, 4, 5.5.$540.00
RMR...............................$161.00