The other day we had a power outage and apparently surge that was enough to blow out the PSU on my computer. A day or two later I've noticed the ceiling light in my office is now clicking, regularly (around once a second at an estimate.).
It only makes this sound when it's powered on, stops immediately on powering off, but doesn't always make it even when powered on.
I've included a video of it, and I'm wondering what is causing it, is it dangerous and am I likely to be able to replace the broken part or will I have to replace the entire lamp?
The clicking starts around 10 seconds in, stops momentarily and starts again:
https://www.youtube.com/watch?v=CQ65tr330HA&feature=youtu.be
Best Answer
I think it's the motion sensor, which this light is equipped with.
The motion sensor is probably not bespoke for this light, and is a commodity module. The module supplier doesn't know if it will be controlling 0.05 amps or 5, so it uses a nice burly mechanical relay that is probably overkill for this light. That's what you are hearing.
I also suspect the motion sensor may be designed for low voltage, which makes current proportionately larger (quite much larger for 12V). Current decides the relay size.