The answer to 'why is my surge protector flickering lights' is that a flickering or blinking surge protector is often a sign that it is doing its job and protecting your electronics from power surges or spikes. The flickering indicates that the surge protector is diverting excess electrical current away from your devices.
This is normal behavior and not necessarily a sign of a problem with the surge protector itself. However, if the flickering is constant or happens frequently, it could mean the surge protector is nearing the end of its useful life and should be replaced to ensure continued protection for your electronics.