Premium Wheeled Magnifier Floor Lamp - Strong 8-Diopter Magnifcation Powerful magnification and illumination with mobility - rolls to where you need it! Precision optical-quality 5"-diameter glass lens, powerful 8-diopter (3X) magnification Heavy-duty 4-leg stand with full-swivel casters, 34" easy-adjust arm with rotation for perfect angle High-efficiency 22-watt fluorescent lamp produces eye-pleasing light with less heat & reduced glare Unique cantilever arm automatically holds position; convenient power switch on lamp head, UL-Listed