Night Lights is a phenomenon in which people leave their lights on at night in the same geographic area. This phenomenon usually occurs in urban areas and is often referred to as "light pollution". The phenomenon is not only an environmental problem but also a health problem. Night lights can have both positive and negative impacts on humans. On the positive side, it can help people feel safe when they are walking or driving around at night. On the negative side, it can disrupt sleep patterns by making it difficult to fall asleep due to the brightness of the light. Furthermore, night lights can have a psychological impact on people as they may feel their privacy is being invaded by the bright lights. Night lights can also have an impact on wildlife. Wildlife is often disturbed by bright lights and this can cause them to relocate or alter their behavior. This can have a negative effect on the environment by disrupting the natural balance of an area. Overall, night lights can have both positive and negative impacts on people and the environment. It is important to be aware of the effects of night lights and take steps to reduce the impact when possible. This may include the use of motion sensor lights, shielding lights from certain areas, or using low wattage lights.