Yes, some led tail lights need to built in resistor.

Because led tail lights are very small electric currents.

The price of led tail lights with built in resistor is cheaper that’s about usd1.00-usd1.50.

Although most of our led tail lights with built CANBUS error free devices, they can’t remove flickering 100%.

I think most of led tail lights needn’t to built in resistor and only 10%-15% need resistors.

I like to show you some pictures of our led tail lights as below.

Welcome all customers come to talk with us LED tail lights with built in resistor right now.