These Wave+ Magnifiers use two 13W quad compact fluorescents. Viewing area is 6-3⁄4"W x 4-1⁄2"H. Standard 3.5-diopter lens magnifies 1.85X. Higher magnification available with accessory lenses. Options offer 45"L reach and clamp, or 30"L reach with clamp or weighted base. Add the 10-Diopter Swing-Away Lens to your Magnifier to add 2.5X.