William H ClarkWilliam H. Clark, II is a registered professional engineer with wide experience in electrical, lighting, mechanical, and structural projects. An expert on energy-efficient materials and designs, he is the author of Retrofitting for Energy Conservatio. He is a member of the Technical Calculations Committee for the Illuminating Engineering Society, and a member of IEEE, ASHRAE, and ASME, as well as a member of the board of directors of Engineered Systems magazine. Mr. Clark has also written articles for numerous trade and technical journals, as well as several computer programs to model energy conservation strategies. Read More Read Less