That is true and it can cause an inspector to get into hot water. I am cautious not to box myself in. I attempt not to troubleshoot beyond the absolute obvious nor prescribe a cure.
You are right about my goal. I wanted to know the cause of the pulsating light for my own edification. Second, if the pulsating light standing alone was a material defect. Not all anomalies in a home are material defects or report worthy. I seek opinions and a better understanding. I will continue to do so.