Enlightment for a future?

This is a bridge in Kerala right behind my ancestral house. The street lights are put right across the road. For some reason not known to any of the locals the light towards one end of the road always seems low on voltage. The municipal authorities tried everything replacing the lamp post rewiring and even changing the bulb to a high intensity one. An old man sitting at the bridge tells me that this has been happening since the time a lineman mysteriously disappeared from that particular lamp post. They say that he fell off the lamp post into the river, got dragged by the under currents and drowned. Wonder how much of it is true but one thing I have seen is the other side of the bridge is always dark.