The largest and clearest magnifier on the market features excellent image clarity, lighting control and energy efficiency. Made in the USA. The O.C. White Vision-Lite&reg; <strong>72400-B</strong> is the world's first and only dimmable fluorescent illuminated magnifier. </p><p>"Patented" state-of-the-art microchip controlled ballast technology allows the Vision-Lite&reg; to be dimmable from 100% down to 25%, so that highly reflective surfaces can easily be seen by dimming the units exclusive high output three-sided bulb.</p>