Use #47 bulbs, not #44, in EM games

A #44 runs hotter and draws more current than a #47. Behind a backglass that extra heat helps lift the paint, so fit #47s throughout; 50 to 100 bulbs covers most games.

Systems

• Electro-mechanical

Related tips

• Dim or flickering lamp sockets
• Wedge sockets in older wide-body pop bumpers: the bulb may not clear the cap
• Car bulbs look right but are 12 V

Source: Repairing Electro-Mechanical (EM) Coin Operated Games to 1978, Part One, Clay Harrell (pinrepair.com)