Re: Flickering lights in house.
If it is just one circuit, check and make sure you don't have a poorly fitted breaker, that the screw on the breaker is tight against the wire, and that the neutral is tight.
If it's all your lights, have the power company check the transformer connections, this problem is often caused by a loose neutral. Then have the drop connections in the new panel check to make sure they are tight. I would recommend you have someone qualified for this.
Be sure you live your life, because you are a long time dead.-Scottish Proverb