Pinball LED Conversion: Pros, Cons and How to Do It Without Ruining the Look
Swapping incandescent bulbs for LEDs is one of the most common upgrades owners make. Done well, it protects artwork and makes the game easier to live with. Done badly, it turns a warm, glowing playfield into something that looks like a dentist's office.
This guide covers what changes when you switch, the trade-offs collectors argue about, the technical quirks that catch people out, and a step-by-step plan that keeps your options open.
- Pros: LEDs run much cooler and draw less power than incandescent bulbs, last far longer, and reduce heat damage to plastics, inserts and the backglass.
- Cons: a poorly chosen conversion looks harsh and blue, can flicker or ghost on some machines, and changes the original lighting character collectors may value.
- For most owners, a warm-white conversion with bulbs designed for pinball is a sensible upgrade, as long as you keep the original bulbs bagged and labelled.
- Go slowly: convert the backbox general illumination first, judge the result, then move on to the playfield.
Why owners convert
Incandescent bulbs produce light by heating a filament, which means they also produce plenty of heat. Over years, that heat bakes the plastics above them, discolours inserts, warps or blisters backglass paint, and can char the wood around sockets. LEDs produce far less heat for the same visible light.
Protects plastics, inserts and backglass art from heat damage over time.
Fewer burnt-out bulbs to chase, especially in hard-to-reach spots.
Less current through general illumination circuits, connectors and transformer.
Easier to light dark areas and show off artwork.
The reduced load matters on some older games, where general illumination connectors are a known weak point. Heat from high current can discolour or burn connectors over time. LEDs reduce that stress, though they do not fix a connector that is already damaged.
The downsides people don't mention
| Issue | What it looks like | How to avoid it |
|---|---|---|
| Harsh, cold light | Blue-white glare that washes out art | Choose warm white for general illumination; test before buying in bulk |
| Flicker | Visible strobing, mainly on some solid state lamp circuits | Use bulbs designed for pinball, often described as non-ghosting or flicker-free |
| Ghosting | Faint glow on lamps that should be off | Same as above; some boards and circuits need specific bulb types |
| Lost atmosphere | No warm fade on lamps; too even and bright | Moderate brightness, warm tones, keep some original bulbs in key spots |
| Originality | Purists may prefer incandescent | Keep and bag the original bulbs so the conversion is reversible |
The atmosphere point deserves emphasis. Incandescent bulbs fade in and out slightly, giving lamp effects a soft, organic feel. Standard LEDs snap on and off. Some pinball-specific LEDs are designed to mimic that fade. If the "feel" of your game matters to you, try a few before you commit.
The technical basics
Bulb types and bases
Pinball machines commonly use small wedge-base and bayonet-base bulbs. Different spots in the same game may use different types. Before you buy, check the bulb list in your manual or pull one bulb of each type and match it. A title-specific LED kit, where available, saves this step.
General illumination vs controlled lamps
Most games have two lighting systems. General illumination (GI) lights the playfield and backbox steadily. Controlled lamps are switched on and off by the game to show inserts, modes and effects. GI conversions are usually straightforward. Controlled lamps on some solid state machines are where flicker and ghosting appear, because of how those circuits switch power. That is why pinball-specific bulbs exist.
Flashers
Flashers are the bright lamps fired by the game for effects. They are often driven differently to ordinary lamps. Some owners leave flashers as incandescent; others use LEDs made specifically for flasher positions. Don't assume a regular LED works there.
EM games
Electromechanical games use simpler lamp circuits and are generally straightforward to convert, though the look changes in the same way. Many EM collectors keep incandescent bulbs for authenticity, especially in the backglass.
Always switch off and unplug the machine before changing bulbs. Lamp circuits and nearby coil wiring can carry voltage, and older machines can have exposed connections in the backbox. If a socket is burnt or loose, repair the socket rather than relying on a cooler bulb to hide the problem.
A sensible conversion plan
- Identify your bulb types. Use the manual's lamp list or pull one of each type.
- Buy a small test batch in two or three colour temperatures. Warm white is the most common choice for GI.
- Start with the backbox GI, since it is the most visible and does the most to protect the backglass from heat.
- Judge the result in your actual room lighting. Photos lie; your eyes in the game room are what count.
- Move to playfield GI, then controlled lamps, testing for flicker and ghosting as you go.
- Bag and label every original bulb by location. Store them with the machine's manual.
- Fix any burnt sockets or connectors you find along the way. Conversion is a good time to inspect wiring.
Tools that make the job easier
Bulb swapping is mostly fingers and patience, but a few small tools help. A bulb removal tool, typically a rubber or silicone tube that grips the bulb, saves your fingertips on stubborn wedge bulbs and makes reaching into tight sockets under ramps far easier. A small flashlight or head torch helps you spot discoloured or loose sockets, which are worth repairing before you install anything new. Many owners also keep a parts organiser with labelled compartments, one for each bulb type, so originals and replacements never get mixed up.
Browse bulb removal tools on Amazon · Browse parts organisers on Amazon
Work methodically: one area, one bulb type at a time. Test as you go with the game in attract mode, which cycles through most lamps, so you can spot any that are dim, flickering or not lit.
Choosing colours
For general illumination, most owners settle on warm white or a mix of warm and natural white. Under coloured inserts, a white LED shines through the insert's colour just as a white bulb did. Some owners use coloured LEDs matched to inserts for extra saturation, but this can look garish if overdone.
A good rule: if a first-time visitor would notice the lighting before the artwork, you have overdone it.
Does LED conversion affect value?
It depends on the machine and the buyer. On many player-grade games, a tasteful, warm conversion is widely accepted and may even be welcomed. On rare or highly original games, some collectors prefer incandescent and look for unmodified examples. Because LEDs simply plug into the existing sockets, a conversion is reversible if you keep the original bulbs. Disclose it when selling.
To see how listings describe converted games, search completed sales for your title with "LED" in the query. See completed sales of LED-converted games.
FAQ
Will LEDs damage my pinball machine?
Properly chosen pinball LEDs generally reduce stress on the machine because they run cooler and draw less current. Problems usually come from using the wrong bulb type in controlled lamp or flasher positions, which can cause flicker or ghosting rather than damage.
Why do my LEDs flicker or glow when they should be off?
That is usually because of how some solid state lamp circuits switch power. Bulbs designed for pinball, often described as non-ghosting or flicker-free, are intended to handle this. Swap a test bulb into the problem position to confirm.
What colour LEDs should I use?
Warm white is the most common choice for general illumination because it resembles incandescent light. Test a few colour temperatures in your room before buying a full set.
Should I convert an EM machine?
You can, and it reduces heat on the backglass. Many EM collectors keep incandescent bulbs for authenticity. If you convert, keep the originals so you can reverse it.
Do I have to convert everything at once?
No. Many owners start with backbox lighting to protect the backglass, then decide whether to do the playfield. A partial conversion is perfectly normal.
The bottom line
LED conversion is worth doing for most home owners, mainly to protect artwork from heat and to reduce bulb-chasing. Use bulbs made for pinball, favour warm tones, convert in stages, and keep the originals bagged and labelled. That way you get the benefits without giving up the option to go back.
Before you start, our game room setup guide covers how room lighting affects how a playfield looks.