Night lights, usually in the form of mini-lamps, have become part of many people's life in recent years. In the old days, people had to rely on moonlight or stars to see when they were out at night. But now, with the development of science and technology, night lights can provide a soft, comfortable and reliable lighting here and there. Night lights are especially useful in dark places where regular lighting is unavailable. For example, they may be used in stairways, hallways, garages and other places to provide sufficient illumination. In some countries, night lights are installed automatically in areas where it is often dark, such as public parks and streets. In addition to providing lighting, night lights are also good decorations. To many people, these mini-lamps bring a pleasant and comfortable atmosphere. There are many types of night lights available in the market, featuring different shapes, sizes and colors to cater to people's different needs. Night lights are not only useful, but also energy efficient. Most modern night lights use low power LED bulbs for lighting. These LED lights are much more energy efficient than traditional bulbs, and can last much longer. This saves people a lot of money on their electricity bills. To sum up, night lights are an essential part of many people's life. They offer a convenient and energy-saving way to light up dark places. With the wide variety of options available, there will surely be one to suit everyone's needs.