House is under two years old. Builder grade fixture would strobe faintly and intermittently. I replaced it with a ceiling fan with a light kit. Fan and light are on different switches. Light still has a faint strobe that lasts for 2-3 seconds about every 20-30 minutes. The same as the builder grade fixture. I replaced the switch and still have the strobe effect. I replaced the bulbs and still have the strobe. Strobe occurs regardless of the fan on or off, a/c on or off, middle of the night, middle of the day. It happens in winter, summer, fall, and spring. I've attached a video. It is very faint and barely visible on my phone. I'm not sure what type of quality will be seen after the upload. Can recommend my next troubleshooting step? Should I remove the panel cover and try tightening the breaker screw? Any help would be appreciated.