We have some LED lights on some nearby footpaths I’ve not checked those yet, but I have an on-going problem with a local intermittent wide-band noise that wipes out 2m SSB (when the beam is in that direction) and leads to noise on even strong local 2m FM stations. I did go out with the 817 a couple of weeks ago to try to find the source and found one illuminated sign at a bus stop was producing noise and one LED illuminated give way sign was too, but neither of those were the cause of my local noise (I have yet to find what is).