I just noticed on my Caribbean Cruise cocktail that the lamps in my 2 bumpers are by far brighter than any others. Also when I turn the game off, these 2 lamps stay on & slowly fade out. They don't completely go out until about 5 seconds after the game is turned off. I get the same behavior with both incandescent & LED. All the board MosFET's test ok. There is a small resistor board under the PF that these lamps seem attached to. 4 of them they all have the same spec so I think they are ok.
I don't have a manual though, that might be helpful.