Moses described the plague of darkness in Egypt as a darkness you could "feel." Certainly, this was more than just the darkness of a night sky and more than the lack of natural light from the sun, or moon or stars. It also included the extinguishing of artificial light as well, no light from candles, oil lamps or torches. Some people think that God brought the darkness of hell to the land of Egypt. Whatever it was, those who experienced it suffered and struggled because of it. But in the land of Goshen where the Israelites lived, there was no darkness during these days.