What does the Bible say about darkness and light in Exodus?

In Exodus 10:21-23, God sent a thick darkness over Egypt that could be felt, while the Israelites enjoyed light in their dwellings. This stark contrast illustrates God's sovereign power and His ability to protect and distinguish His people from others. The darkness was not merely physical but represented spiritual blindness and the consequences of sin, while the light signified hope, salvation, and God's grace bestowed upon Israel. This narrative reflects God's ongoing theme of separating light from darkness throughout Scripture, culminating in the ultimate light, Christ, who dispels darkness in the hearts of believers.