Flashlights are handheld, portable lighting devices used to illuminate dark spaces. They come in various sizes, from small keychain flashlights to larger, high-powered models for outdoor or industrial use. Flashlights typically use LED or incandescent bulbs and come with features such as adjustable brightness, rechargeable batteries, and water resistance. Shopping for flashlights online offers a variety of models to suit different needs, from everyday use to specialized tasks.