Interior Dome Light Buzz

[00328]

I've just recently noticed that when I'm sitting in the runner and open the door I can hear a slight buzz coming from my dome light as the light gets brighter. I can also hear it again when I close the door it buzzes slightly as the light gets dimmer.
I know it didn't always do this.
Anyone else notice this?

 

[2003-4x4runner]

Same noise

I have the same slight buzz comming from the dome light as well.
It took me a while to find the noise and it started 6 months ago.
I noticed it doesnt buzz as much as it did before. Maybe its time to replace the bulb?

 

[00328]

My first thought also, maybe the bulbs need replacing. But they are still nice and bright.
I also thought it may have something to do with the reostat since the lights dim down before they go out and start dim and then go brighter.
Does the SR5 have 2 bulbs in the dome and so called 'theatre' lighting?

 

[2003-4x4runner]

My first thought also, maybe the bulbs need replacing. But they are still nice and bright.
I also thought it may have something to do with the reostat since the lights dim down before they go out and start dim and then go brighter.
Does the SR5 have 2 bulbs in the dome and so called 'theatre' lighting?

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The SR5 only has one bulb,( as far as i can tell) i never had to replace the bulb yet since i bught the 4 Runner used in 2005.

It could be the reostat, but i never noticed it before.