I've got a Neo 4 slot, and the lights behind the coin reject buttons were not working. The number on the bulbs that were in there were "259". The local automotive place, and Radio Shack don't have that bulb. I used a pair of "168" bulbs. They do physically work, but before I leave it one for an extended period of time, I thought I would check to see if these are suitable replacements. I don't want them to get to hot and start melting anything, or just draw to much current that would be going to the game board.