The REED LM-81LX is a compact, autoranging light meter that reads illuminance in both Lux (0-20,000) and Footcandles (0-1,860) via a 5-digit LCD, with data hold, zero adjustment, and min/max capture for quick facility or workspace light-level checks. It responds in under a second and includes low-battery and over-range warnings, powered by a single 9V battery. This NIST-traceable variant pairs the meter with an accredited calibration certificate for users who need documented measurement traceability.