I was looking at eBay yesterday and came across a Broadway playfield that has a lightbulb (beneath the playfield) at the Ballyhole (#16) hole. I imagine it also lights when the Ballyhole feature is awarded on the backglass. That got me curious about my Ballyhole games, Night Club and Key West. Neither of them has a bulb at the #16 hole, although the shutter on both games has the same cutout that provides space for the bulb on Broadway. I removed the shutter on my Night Club and there are no cut wires or evidence that a past operator removed the bulb. I looked at the Broadway schematic and didn't see the bulb referenced, but maybe I just didn't see it.
Anyway, I'd appreciate it if someone who has a Night Club, Key West, or another Ballyhole game would confirm that your game does or does not have the lightbulb at #16.
I've attached two photos. One is of the eBay Broadway with the bulb. The other is of my Night Club without the bulb.