National Technical Systems Inc. added to its commercial aerospace business with the $6 million acquisition of Lightning Technologies Inc. Lighting Technologies complements the testing and engineering services of Calabasas-based National Technical and its lightning protection testing is a staple in the aerospace, construction and wind power generation markets, said Bill McGinnis, president and CEO of National Technical. “Lightning Technologies has a strategically important customer base that will give us additional exposure to clients in the aerospace, commercial and electronics markets,” McGinnis said. “LTI presents many new opportunities for us with its clients and adds LTI’s capabilities to our menu of services for our current clients.” The Lightning Technologies staff will remain at the 20,000-square-foot testing facility in Pittsfield, Mass. The company’s client list includes General Electric, Hamilton Sundstrand, Federal Aviation Administration, NASA’s Kennedy Space Center, and Florida resorts of The Walt Disney Co.