Your Partner in Quality Photometrics LightLab International Allentown, LLC is an ISO-Accredited laboratory specializing in personalized, highly accurate measurements of lighting products. With over 40 years of combined experience in the lighting testing industry, the LightLab Allentown team is dedicated to helping its customers navigate the various energy efficiency specifications, listings, and regulations. Typical measurements include: total light output (lumens), luminous efficacy (lumens/watt), luminous intensity distribution (candela), color and color quality (CCT, Duv, chromaticity, and CRI).