Night Lights, also known as artificial light pollution, is the brightening of night sky mainly caused by man-made sources like streetlamps and homes. Though night lights can be beneficial, they can also have a significant negative impact on our environment. Night lights can interfere with circadian rhythms, the natural biochemistry and physiology rhythms that govern our sleep/wake cycle, digestion, hormone production, and other physiological processes. This disruption has been linked to adverse health effects such as insomnia, cancer, diabetes, and cardiovascular disease. Night lights can also impact wildlife. Too much light can interfere with migration patterns, increasing mortality rates. Lights disrupt the biorhythms of animals, which can then cause stress, disorientation, and even death. Light pollution can also be expensive and wasteful. Too much inefficiency in lighting can increase carbon dioxide emissions, energy consumption, and electricity costs. Ultimately, while night lights can be beneficial in certain cases, they can also have consequences that are worth considering. We need to be aware of the potential negative effects of night lighting and take steps to reduce light pollution. Taking simple steps like installing timer switches, using lighter-colored lights, and shielding lights can significantly reduce light pollution in our environment.