I have some can LED lights in my kitchen. When I turn them off after moderate to prolonged use, some of the lights make a “crackle” noise, like the sound ice cubes make after being placed into warm water. It’s is not always the same light making the noise - there are 5 lights on the switch and they seem to take turns making the noise. They also sometimes make this noise when first turned on, but that is much less common.
The lights are around 5 years old, and only started exhibiting this behavior around 6-8 months ago. The fixtures themselves are older - they were there when I bought the house.
Is this “normal”, or at least OK? I’ve never heard this type of sound on other LEDs, so I am concerned. If there is a problem, is it just a matter of replacing lights, or is this indicative of deeper issues?