Maybe my factory can supply a method how to test a light bulb without a multimeter.

My factory is an OEM and ODM supplier as auto light bulbs.

When our workers test a light bulb, they have a simple tool.

That simple tool including an inverter, 2 copper bars and wires.

Using that device can test a light bulb very quick and convenient in 12v or 24v.

In order to make you clearly how to test a light bulb, I will show you picture as below.

If you would like to get more information about how to test a light bulb without a multimeter, please send email to me quickly.

Meanwhile, any people have any good methods to test a light bulb without a multimeter, you can also inform me.