How important is light and darkness for my toddler’s sleep?

A night light can often help a child fall asleep by providing a small amount of light in the room, which can make the child feel more comfortable and secure. It can also be helpful for children who are afraid of the dark. However, the light should not be too bright and should not be used in the child's eyes. Additionally, it's important to consider the child's age and how much light they need to feel comfortable. Some children might need complete darkness to fall asleep, while others might need a small night light.