[Ron Ramirez]

Ok. As I recall the lamp is incandescent, so you have to do one of two things: one, replace with an identical incandescent bulb; or two, replace with an LED but you will have to add series/parallel resistance to make the MPX decoder "think" it is incandescent.

Or do as you mentioned and just leave it alone. I would not do that, however - I would want a working bulb.