Headlights dimming when using window switches

[Critical_Mass]

Hi all,

Hopefully this will be a quick thread and resulting in the answer as yes, but i doubt it.

Was on a dark road yesterday and i used the drivers window up switch (window was already up so window reg just clicked), i noticed the headlights dim ever so slightly and only for half a second. I then did the same on the other threeswitches on the drivers door and they all do the same. But the single ones in the other doors dont do this to the headlights.

Is this normal?

Thanks