Dimming (pulsing) lights in house can not find cause
Are there industrial plants within your area? I have seen problems on the main power feed from the utility caused by industrial equipment power factor balancing capacitor banks. I have also installed quite a few whole house surge protectors in that same area, the surges are easy to see with an Oscope but the power factor issue was tough until I rented a high end powermonitor that could detect the lead / lag issue. Both problems were caused by a plant several miles away, they were able to fix the problem with the cap banks as they had it set two sensitive and it was constantly hunting up and down causing some problems for home electronics in the area. The surge protectors were the only way to prevent damage to sensitive electronics because when huge electric motors start and stop they create dips and spikes on the line. Not sure if the power factor is causing your pulsing but it may be worth looking into.