As the LED thread is pretty quiet, I'll post in here.
My man task for this evening was to install 5 Screwfix LAP LED bulbs... yeah, manly.
I have a 5 arm pendant in the front room which I have just installed. I screw in the bulbs and turn it on. Only 3 illuminate. I think great, two duff bulbs. I swap one of the working bulbs for one of the duff bulbs and try again. The working bulb now doesn't illuminate, but the previously duff one does. It turns out that two arms don't work...
So one last troubleshoot, I tried a Philips bulb in one of the duff arms, and it worked!
So I have some LAP bulbs which don't work in two specific arms, but a Philips bulb which works in all arms.
And an additional point, when the p[Philips bulb is on in one of the two non working arms, it destroys my DAB radio signal. But if I put it on one of the other three, the signal is unaffected...?
Has anyone come across anything remotely like this before?