This clamp-on full spectrum lamp is the workhorse of magnifiers! With all metal construction and a long 48 inch reach, this heavy duty performance lamp will fill virtually any need. The large 5 inch, 3-diopter glass magnifier lens enlarges by 175% to aid in work details, crafting, sewing, hobbies and more. This lamp includes a 22W circling full spectrum daylight bulb which provides a vivid and glare-free natural daylight effect for close-up detail work. The metal clamp is adjustable up to a 2-1/2 inch opening, making it adaptable to a wide variety of mounting surfaces. The clamp also includes a metal locking pin to prevent unintended lifting of the magnifier while in use. Includes manufacturer's limited 90 day warranty.