Pilot lamp specifications

Nov 23, 2025 Last reply: 7 months ago 7 Replies

Hi,



Within part lists of electronic circuits pilot lamps are often specified by numbers (like "#46"). Is there a table where the electrical data corresponding to these numbers can be found?



Many thanks in advance for hints.



Best regards



Reinhard


Here's what came up as a result of a Google search on 46 lamp specs: #46 Miniature Incandescent Lamp Voltage: \(6.3V\) Wattage: \(1.57W\) Current: \(0.25A\) Base: E10 Miniature Screw Base Shape: T-3 1/4 (or T1.75) Lumens: Approximately 46 Average Life: 3,000 hours Common Uses: Indicator lights in arcade games, pinball machines, and other electronic equipment

Ed

Hi Ed,

Many thanks. But "#46" was just an example. Indeed, I'm searching for a table for not having to start always another individual search when finding such a number.

Best regards

Reinhard

It sounds like you're looking for a vintage GE lamp catalog. I remember looking through one back in the late '80's or early '90's, but haven't seen one since. Most likely Phillips, Sylvania and other lamp producers published similar documents.

Where any have been preserved is unclear, at least to me.

The Thomas Register and Sweet's Industrial Catalog File were firms that prepared hardcopy library volumes of commercial sales literature. They aren't specifically lamp-related, however.

hth,

bob prohaska

Ah. This might help:

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Ed

So the "type numbers" in commercial manufacturer's lamp catalogs have become references for specifying pilot lamps? Strange! I'm used to find such lamps being specified by voltage and current ...

Regards

Reinhard

ehsjr schrieb:

[...]

Yes, indeed! That's exactly what I've been looking for! Great! Many, many thanks!

Best regards

Reinhard

But, lamps have many characteristics besides volts and amps; base, diameter, length, filament location and so on.

At some point it became customary for "industry standard numbers" to appear in manufacturer's literature. I'm not sure when this happened, nor what exactly it's derived from in your context. It's possible that the "# 46" lamp isn't such a number, just a well-known customary one.

Here's an example, mostly for architechtural lighting:

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It's likely you will need at least a few different company catalogs to assemble a reasonably complete list.

Now that tungsten indicator lamps have been supplanted by LEDs the body of reference literature is likely to dissapear fairly rapidly.

bob prohaska

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