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wrote:
We've only been in our house (30 year old home) for a few months. We
can tell whenever the AC or furnace kicks on because there's an almost
imperceptible dimming of the lights. Can someone explain the possible
reason(s) for this? We have a home warranty and if this is something
serious then we'd like to have it addressed quickly.

Thanks!

That's probably normal. It's when the lights get *brighter* (or dim
drasticly) when something kicks on that you need to investigate it.

Bob