Night Lights, a phenomenon seen most clearly on a clear night, is a breathtaking sight. It is also known as airglow or nightglow, and occurs mainly in the upper atmosphere, usually 50 to 100 kilometers above the Earth's surface. The night lights are caused by a complex but beautiful chemical reaction that releases energy in the form of light. They are generally very faint and can be seen clearly only in the dark, far away from the cities. Although the reaction leading to night lights is the same everywhere, its color can be different in different places. In some places, the night lights resemble the light of a burning candle, while in other places they can be so bright and colorful that they look like a rainbow in the sky. In most cases the night lights have a greenish hue. The night lights have been a topic of scientific research for many years, with astronomers trying to uncover the mystery behind their colors. Scientists now believe that different colors of night lights result from different molecules present in the upper atmosphere. Night lights are an amazing and beautiful natural phenomenon. We should take some time to appreciate them every once in a while. They remind us of the beauty of nature and the complexity of how the world works.