I've been on a journey of tracking down sources of RFI from within my home, and one of the top offenders has been LED light bulbs. Specifically, it's the switching mode power supplies (SMPS) within the LED bulbs or fixtures that cause the interference, generally not the LED itself.
We have a large number of 6" downlight / can fixtures in the house, and I've been through a number of different 65w (equivalent) LED bulbs looking for ones that are RF quiet. After trying probably 10 different types, I've found ones that are quiet and work well. They aren't cheap -- as they're not one of the Chinese brands that you find all over the internet.
The latest GE LED bulbs work great. Specifically the "Relax" series (BR-30 style), seems to be really quiet. You can find them at the Big Box stores or online. Although no bulb creates zero RFI, these haven't caused me any problems. I just bought some GE Classic LED bulbs to try as well, and so far so good.
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