CLIFFORD J. YAHNKE, PhD, chief scientist and head of clinical affairs for Indigo-Clean and Kenall Manufacturing, may be reached at [email protected]. Indigo-Clean is a registered trademark of Kenall Manufacturing Co., a Legrand company. Kenall was founded in Chicago in 1963 and has built a reputation for durable lighting solutions. Today, the company creates solutions for the healthcare, cleanroom/containment, food processing, transportation, high abuse, and correctional lighting markets. Kenall luminaires are designed in Kenosha, Wisconsin, and comply with the Buy American Act (manufactured in the United States with more than 50% of the component cost of US origin). For additional information, visit indigo-clean.com.