Night lights are an incredibly useful invention. They are used to provide safety and convenience during nighttime hours, and they come in a variety of shapes, sizes, and colors. The most common type of night light is an LED night light. LED lights are energy-efficient, since they consume very little electricity, and they are long-lasting, so you won't need to replace them very often. LED night lights come in many different colors, and can be found in a variety of shapes, from stars and moons, to hearts and animals. Another type of night light is a motion-sensing night light. These lights are designed to automatically turn on when motion is detected, providing a sense of safety and security when you are in a dark room. They are usually battery-powered, so they don't need to be hardwired into a wall, and they can come in many different colors as well. Finally, there are plug-in night lights. These lights plug into regular wall outlets, so no batteries are needed. They generally provide a soft, warm glow, and are great for keeping a hallway or bathroom lit up at night. Overall, night lights are an incredibly useful invention that provide safety and convenience. They come in a variety of shapes, sizes, and colors, and they are a great way to light up a dark area at night.