The TL;DR is to try a choke on the antenna cable as close as possible to the head unit but since it cannot stop all the electromagnetic interference from reaching the receiver, it won't solve the problem.
It will make a difference but how much of a difference is difficult to say. The LED transformers/drivers inside the spotlights and light bar cause the interference and the cheaper and lower quality lights usually have no EM shielding, usually relying on the light's metal body, and their lower quality components emit more EM interference too.
I know of two ways to get rid of it in lights:
* Chokes on the wiring between the driver and LED.
* A Faraday cage of a conductive metal mesh wrapped around the driver.
Except for LED headlights with external drivers, most lights are too tightly packaged internally to make either solution practical, even if you're willing to open them up and void the warranty.
I have found that the interference is slightly less on certain frequencies, so I have daytime and night-time radio stations.
1999 Jeep TJ
Static from LED Driving Lights
