Our light boxes are built with Solid State L.E.D. technology, which means that you no longer have to utilize fluorescent tube models which can run hot and flicker. The Copic LED Tracer provides instant on and off with no light flicker, as well as a nice cool work surface. The result is an ultra thin and easily portable unit that fits into a briefcase or portfolio case, making transportation a snap. The smoothly rounded edges eliminate creases in your work materials and provide comfort for your hands and wrists. With zero bulbs to be broken, the Copic LED is designed to withstand the rigors of everyday use and will yield a durable, long lasting life.