A zoomable flashlight typically utilizes an adjustable lens mechanism to control the focus of the light beam. By twisting or sliding the lens, the user can change the beam's width and intensity. When the lens is adjusted to a wider position, the flashlight produces a floodlight effect, illuminating a larger area with a softer light. Conversely, when the lens is adjusted to a narrower position, the flashlight produces a spotlight effect, focusing the light into a more concentrated and intense beam.