Magnifier Lamp Professional, low heat magnifying lampwith high quality extra-large 5" diameter lens features a fully adjustable internal spring arm with a 45" reach. Convenient stay cool handle on head for positioning. 3 diopter glass lens provides 1.75X magnification. Removable protective lens cover makes this magnifier lamp usable as a table lamp. Takes one T5 22W daylight simulation bulb (included). Includes heavy-duty desktop mounting clamp that fits up to 2.5" thick surfaces. All metal construction. UL listed.