With lighting technology advancing to include larger and more complex devices, Labsphere has introduced the LMS-3M 3-m integrating sphere for complete optical characterization of these larger lamps and luminaires. The sphere complies with IESNA LM-79 and LM-80 standards to deliver accurate and reproducible measurements of any lamp, up to 2-m linear lamps and 30-cm luminaries. The lamp measurement integrating sphere accommodates light sources positioned base up, base down or longitudinally to easily and efficiently measure virtually any lamp type, including fluorescents up to 2 m in length. The design also allows for forward and partial flux measurements of test sources that are board-mounted or heat-sinked. The LMS-3M can be customized with the software and accessories to fit testing needs.