mdavej,
In this thread, I advised a poster on how to program a RCRP05B to reset the lamp hours, but it didn't actually work.  The recipe to reset the lamp hours includes sending a discrete Power On signal for 10 seconds.  The RCRP05B needed a keymove to provide the Discrete On signal, and it turns out that after a keymove, the remote has small gaps in the train of IR.  Probably this was the reason the lamp resetting didn't work.  Of course, with a $8 JP1 flash cable, it is easy to get uninterrupted IR signals.

In any event very few $3 remotes will have Discrete On included in their setup codes.

Josef,
If a Harmony can reset the lamp, a correctly programmed Arduino can do it also.