Sunset lamps are designed to mimic the colors of a sunset, and are often used to create a relaxing atmosphere in a room. These lamps can be used to help people fall asleep at night, as the gradual change in colors is thought to be calming and soothing. Some people also use sunset lamps to help them wake up in the morning, as the gradual change in colors is thought to be less harsh and jarring than a regular alarm clock. Overall, the main purpose of a sunset lamp is to create a calming and relaxing atmosphere in a space.