Why did Baba keep lamps lit while sleeping on the hanging plank?

The source material describes a fascinating scene involving Maharaj's sleeping arrangements. According to Chapter 0, after a devotee provided a wooden plank, Maharaj hung it from the rafters to sleep on. The text explicitly states that while sleeping on this suspended plank, Maharaj would place four lit lamps at the four corners. However, the provided passages do not offer a reason for this practice; it is simply presented as a fact of how he slept on the plank, which drew many curious onlookers.