Do you know what’s difference between t10 and t20 bulb?

In this letter, I would like to explain to you T10 vs t20 bulb in brief.

At the first, T10 bulbs are always single filament, but t20 bulb includes single beam and double beams.

The second, T10 is small size, which is about 10mm diameter, but t20 is 20mm diameter.

The most diffrence of t10 and t20 bulb is watts.

T10 is 12v 5w, but most of t20 bulb will be 12v 21w.

In order to make you clearly t10 vs t20 bulb, I will show you picture as below.