It could be, but there are other things that are more likely. What type of bulb are you using?

All 4 LED Recessed lights on dimmer switch just started flickering. (4.5w dimmable GU10 LED bulbs)

The dimmer switch is is also dimmable
Lutron Diva C.L Dimmer Switch for Dimmable LED, Halogen and
Incandescent Bulbs, with Wallplate, Single-Pole or 3-Way, DVWCL-153PH-LA

- It only happens sometimes

- 4 other LED's on a DIFFERENT dimmer switch (but same circuit) also flicker sometimes, whether the other dimmer switch is on or not.

- It doesn't matter how bright I have the dimmer

- They were fine for 2 years

What could be causing this?

Is it dangerous if the lights are on? If they are off?

Thanks in advance for any help!

@beachguysb - did you ever find the cause of your flickering LED lights? I'm having a similar situation in my home and haven't been able to determine the cause.

So this didnt happen for 2 years? well then I would say it is whatever LED lights were put in where cheap to put it as nice as possible. I would pull one down, by grabbing the trim ring and see how they were installed. He may have put in regular cans and retrofit LED trim which would be great because they can be swapped out.