Nightlight, or illumination, refers to a small light source designed to provide a gentle glow during the night. Typically used in bedrooms, hallways, or nurseries, nightlights help prevent darkness-related anxiety and guide individuals safely in low-light conditions. They come in various styles, including plug-in models and battery-operated options, and can feature different colors and brightness levels. These lights often use energy-efficient technologies, such as LED bulbs, which consume less power and have a longer lifespan than traditional incandescent bulbs. Nightlights can also serve decorative purposes, with designs that appeal to children or complement home decor, making them both functional and aesthetically pleasing.