Green-Lite LED Magnifier has a 7 Inch x 5-1/4 Inch rectangular 4 diopter lens, a 43 Inch reach and a Weighted Base fitting. Green-Lites employ next generation “surface mount” LEDs that produce more light with less glare, consume less power and last longer. The light output of the 8W LED array is comparable to a 150W halogen. The blended white light is easy on the eyes and the output level is adjustable - simply and precisely - for maximum operator comfort. Green-Lites products are auto-switchable, too, so they can be used worldwide simply by changing the end power cord. - Green-Lite magnifiers use surface mount, multi-angle LEDs for shadowless lighting, reduced glare and heat and to save energy. User controlled LED groups shine light where it is needed. Precision ground, optical grade, 4-diopter lens provides 2x magnification.