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In page Lisa C. Klein:

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Klein's research focuses on the area of sol-gel science, a low-temperature process for making ceramic coatings. Her most important contribution to science has been the development of electrochromic window coatings that can be lightened or darkened through the use of a dimmer attached to a battery. This window coating is unique because it is manually controlled and can reflect the heat away, while still transmitting light in the summer or permit the solar heat in winter. This new development is more efficient than blinds, curtains, or tinted windows and can save on heating and cooling costs in the home or office.[citation needed]