Found this article sent in by a reader of our newspaper regarding the new LED bulbs. I have not purchased one yet but I have seen them in Walmart. anyone have any insight into this problem? Letter If you are concerned about the electromagnetic signals produced by the new smart meters, let me add to your list of devices to fear: those new LED lights. A few weeks ago, I installed one in my computer desk lamp, and soon found out that it produces radio frequency interference (RFI) that is heard as a high-pitched noise on my hand-held aircraft radio. A quick search on the Interned (for led rfi) showed me that the problem has been known for a while. http://www.ok1rr.com/e107_plugins/content/content.php?content.181 To make those lights more energy efficient and keep them small, the manufacturers use what is called a switched-mode power supply that produce a high-frequency signal to drive the LED. That signal should be filtered, and the circuit properly shielded, but on some of the cheaper products it is not done. Apparently, some of the floodlight-type LED lights can emit a very powerful RFI. One customer says on the Net: I emailed the supplier, and he advised me that he has paperwork which certifies the lights with a C tick compliance. The paperwork is obviously fraudulent or he is just telling lies. Most of the goods from China have fake EMC compliance documents and certification. While my desk lamp emits RFI, a bigger flood-light type in my garage does not. Someone with the proper equipment should check all those lamps.