Quoted from zacaj:https://www.cometpinball.com/products/1flux-bulbs are literally designed to work with bally/stern games
I love that Ryan even says that running the anti-flicker board with standard bulbs is cheaper than using those bulbs. That's how great Comet Pinball is!
I'm the ultimate cheapy and solder resistors onto each socket, since most games of these era need some attention at the sockets anyway. I've used Seigecraft boards in the past and they work great as well for a plug 'n play option.