would be Roll Shutters, which gives you immediate protection at the touch of a button, which also makes for great protection from any type of bad weather, since the shutter can be rolled down in seconds. Also, the Crimsafe Brand of Hurricane Screens is a product that can stay in place all the time for 24/7 protection, and offers ventilation and light. The stainless steel mesh has the appearance of a regular insect screen, but meets all security and hurricane codes. The least expensive type of protection would be the storm panels, which can be time consuming to put into place and have to be stored away when not in use. Accordion Shutters are also a good choice to enclose a large area, like a lanai, and are less costly than motorized shutters.