SE MC339-90W 5X White Magnifier with 90 LED Reading Lamp, 10" x 7" x 22" 5-Inch optical-quality glass lens precision ground to 5x magnification Rimmed with 90 super bright LED - pure white light without heat or flicker at fraction of energy use 40-Inch articulated flex arm is spring-supported for feather-touch positioning; full-swivel lamp head Clamp base securely attaches to desk/table top - out of your way without taking valuable work area