Advanced Free Form Lighting Technology. Hella’s powerful Free Form Reflectors employ computer-aided design to deliver a precise beam pattern, producing up to three times more illumination than ordinary lights. The Hella Fast-Fit system mounts quickly and easily on molded bumpers, air dams, or brush guards. Makes beam aiming a breeze. Maintains an extremely tight grip on the lamp to keep beam placement accurate. Fast-Fit mounts with a single nut and bolt or two molly bolts for tight spots or limited access areas. Available in three different shapes in fog and driving applications, the FF Series gives you big light performance in a small size.