On Thu, 12 May 2016 09:27:26 -0700 (PDT), GARYWC
wrote:

Several weeks ago, the lights on one circuit in my condo became much dimmer and the light bulbs flicker.

A response to a different post suggested having my local power company check their connections and wires BEFORE calling an electrician.

Would faulty power-company connections and wires affect only one circuit in my condo?
No you own that one. It is going to be a bad connection somewhere.