V-LIGHT Full Spectrum Natural Daylight Effect Clamp-On Magnifier Task Lamp with 5-Inch Glass 3-Diopter Magnifier Lens (VS01222B) Large 3-diopter glass magnifier lens measures 5 inches Metal clamp with locking pin safety feature to prevent unintended lifting Fully adjustable swing-arm with 37 inch reach and pivoting shade On/off switch conveniently located on shade Includes 22W full spectrum natural daylight effect bulb