Our calibration laboratory offers efficient turnaround times and is ISO 17025 accredited. National Association of. We are pleased to inform you that LightingLab Calibration Laboratory Ltd. has made significant progress in the renewal of its accredited status in May 2023 and a further expansion of its accredited fields in August 2024. OP-LS5 Portable Light Source A practical, portable LED light source for quick and easy examinations. Our 1,100+ accreditations in 28 metrological and test domains guarantee quality and reliability. Our independence from manufacturers allows us to.