The German Amateur Radio Club (DARC) has issued a press release identifying domestic LED light bulbs as a source of electrical interference

The increasing popularity of these light sources has led to a significant increase in reports of radio traffic disturbance, interruption of radio services and even poor DAB reception. In their opinion, the electrically noisy LED lamps are a result of a bad government policy which simply ignores regulations applicable to EMC and the generation of EMI by electrical equipment.

According to DARC, the recommendations outlined in the regulations governing electromagnetic compatibility have simply been ignored.

Some of the spectrum areas affected include

• Digital Audio Broadcast (DAB) 174 - 240 MHz
• Marine VHF 156 - 162.025 MHz
• Amateur Radio 2 metre band 144 - 146 MHz
• Airband 118 - 136.975 MHz
• FM Stereo broadcast 88 - 108 MHz
• Baby monitors 49.30 - 49.89 MHz
• High-frequency services, inc. long range marine & airband, Shortwave broadcasts, Amateur radio allocations, Citizens' Band radio, plus wireless devices operating on 27MHz 3 - 30 MHz

The result is that LED lamps currently on sale and in use generate considerable wideband RF interference.

Full article - https://www.elektormagazine.com/news/led-rumpus

UKQRM LED Bulb radio interference page - https://www.ukqrm.org.uk/lighting.php