Lighting fixture flickers for like 10-15 seconds, just very slightly, then stops

[Doctrader]

Hi! I have a fixture that flickers for maybe 15 seconds when I first turn it on. Then it stops flickering and functions normally.

Then if I were to turn the switch on soon after it stops, there is no flickering.

Then if I wait 30min or so and turn it on again, it flickers just briefly again.

I did change the switch next to it in a two gang to a smart switch that has a neutral, not a dimmer. That switch works fine.

Any thoughts?

 

[James]

Sounds like you may have a loose cable joint somewhere.

 

[brianmoooore]

What kind of lamp is this? This could be a description of a failing fluorescent fitting.