As most have pointed out, dont go with cheap brands. I have also bought from M4. Sometimes the LEDs can cause radio interference. That is usually from cheaper brands. A .001 capacitor across the leads can fix that. You can also source buying whole fixtures with LEDs from camping world and such but it is not needed unless you want to change the type of light ex> from single pancake to dual for more light. They also make some nice reading lights and under counter ones. My 2017 camper came with all LED lighting and it even has some with motion sensing!