LED:

Reduced Distortion 5" Diameter Optical Grade Aspheric Glass Lens. Durable ABS Head Unit houses 90 Switch Activated, High Efficiency LEDs. Lens flap/cover protects glass when not in use, (removable). Heavy-Duty, Steel, Spring Balanced Extension Arm with Cast Iron Mounting Clamp, securely mounts to tables, desks, counter-tops & more. Inner pad is lined to prevent scratching, 2.5” opening max. Rated luminous flux: 420 Lm / Lumen, Power: 6W, Voltage: 60Hz 100V/110-120V, Color temperature: 6000-7000k, Powerful magnification / 3/5/8 Diopter. Lens Power with working distance ranges: APPROX} 3D long work 12”+, 5D Medium Work 12”-, 8D Close Work 6”-.

Fluorescent:

Reduced Distortion 5" Diameter Hard Coated Optical Grade Aspheric Glass Lens. Durable ABS Head Unit houses a 22W Extra-life circle bulb. Lens flap/cover protects glass when not in use, (removable). Heavy-Duty, Steel, Spring Balanced Extension Arm with Industrial Duty Steel  Cast Iron Mounting Clamp & Optional Rolling Stand. Clamp securely mounts to tables, desks, counter-tops & more. Inner pad is lined to prevent scratching, 2.5” opening max. Includes 22W Extra-long life circle bulb, Voltage:100V/110-120V, Powerful magnification 3/5/8 Diopter. Lens Power with working distance ranges: APPROX: 3D long work 12”, 5D Medium Work 12”-, 8D Close Work 6”-

Simple to use, Use caution when unpacking as arms are spring loaded, QUALITY OPTICS USA Since 2008