Flashes are electronic devices used in photography to provide a burst of light for illuminating a scene. They are essential for capturing well-lit and sharp images in low light conditions or when additional light is needed. Flashes come in various types such as on-camera, off-camera, and studio strobes, allowing photographers to have control over the lighting in their shots. Pre-Owned Flashes are previously owned flash units that are still in good working condition and are sold at a lower price than brand new ones. These pre-owned flashes offer budget-friendly options for photographers looking to enhance their lighting setups.