I saw this story on the BBC news site yesterday but can't find it now...
Apparently commercial aircraft have been suffering radio blackouts in a localised area at 6000-10000ft on approach to Glasgow (UK) airport. Tracing the flight data back, they managed to track the blackouts back to a particular location and reported it to Ofcom for investigation.
Ofcom sent out their trackers, who finally narrowed the interference down to some unsuspecting homeowner who had bought a few 'squirrel cage' style LED filament bulbs from one of the usual culprits! Apparently the squirrel cage format formed an efficient enough antenna at the (I think) 118 and 122MHz commercial aircraft comms bands to pump out enough power a vertical pattern to block them out while the aircraft on approach were still at significant altitude. Presumably the noise source was something like broadband rectifier switching noise!
The potential implications for widespread broadcast interference from large numbers of these imported 'cheapies' are pretty horrible.
Here's the relevant Ofcom page...
https://www.ofcom.org.uk/about-ofcom/latest/features-and-news/interference-issueThe BBC story made reference to a discovery, many years ago, of the same antenna effect with squirrel cage format incandescent filament lamps. Presumably radiating some external noise source, but I can't remember the details.
EDIT: From the photo on the Ofcom site, it's possible that they
were actually incandescent filament ones - I don't know now!