Magnifier lights provide bright, up-close viewing of small parts and objects for assembly, fabrication, inspection, and repair. Their adjustable arm and pivoting head allow precise positioning for an optimal view. Also known as illuminated magnifiers, they are commonly used when performing detailed work in electronics production, laboratory work, dentistry, and jewelry making. The lights' magnification states how many times larger its lens makes an object appear as compared to the actual size. Diopter refers to the curve of the lens. Larger numbers represent thicker, more curved lenses with greater magnification and a shorter focal length (working distance). As magnification and diopter increase, the focal length decreases and the closer the lens must be to the object to get a clear, crisp view.