Another factor that can affect the runtime of solar lights is their brightness level. Some solar lights come with adjustable brightness settings that allow you to customize the intensity of the light output. By lowering the brightness level of your solar lights, you can conserve energy and extend their runtime, allowing them to stay illuminated for longer periods without draining the batteries as quickly. Adjusting the brightness settings to match your needs can help optimize the performance of your solar lights and ensure that they provide reliable illumination when you need it most.