Quoted from Gott72:Do LEDs ghost in the 70's Gottlieb EMs?
Is it necessary to buy anti-ghosting LEDs for these machines?
No and no.
Ghosting is primarily a cause of certain flaws in solid state games. None of that circuitry is present in EMs.
Quoted from Gott72:I'm going to switch over a machine and would hate to order loads of useless bulbs that go into the trash.
If you don't like them, you can always resell them. I've sold a bunch of LEDs I wasn't going to use, and I've seen others do the same. No need to trash them if you don't end up wanting to use them.