Quoted from kbliznick:4. On games with 24 Volt #1251 flashlamps (Pinbot, Cyclone...) These are usually wired 3 sockets parallel to each other. Change the sockets so that the bulbs are wired in series instead (daisy chain them) Technically they will be just at 8-12V each on the flashers but they are still very bright, Then you can use three 12V flashers. Note that when doing this make sure that the 24V enters the first socket at the nipple and exits though the body and then enters the next socket through the nipple and exits the body and same for the third. This is important in case the LED's you are using are polarized as polarized lamps won't light when powered backwards (incandescents don't care which way the current flows) . Note that with the series connection one bulb out of the circuit or broken will cause the other 2 bulbs not to light. I don't think this method will switch back to 12V incandescent very well as the voltage per bulb might be too low, but I haven't tried.
Thanks for the details on the 24v flahsers.
How does this work with SoF? It seems to only have one #1251 flash lamp?