REED LM-81LX Compact Light Meter, 20,000 Lux / 2,000 Foot Candles (Fc)


This compact light meter is capable of taking Footcandle (Fc) and Lux measurements. The LM-81LX is an autoranging instrument that keeps track of minimum and maximum readings and features both a data hold function and zero adjustment button.


  • Easy to operate, compact design
  • 5-digit LCD display
  • Autoranging
  • User selectable Lux / Footcandle measurements
  • Min/Max and data hold functions
  • Zero adjustment button
  • Over range and low battery indicators


Measuring RangesLux: 0 to 20,000  
Fc: 0 to 2,000
Accuracy±(5% rdg.+ 8 dgt)
ResolutionLux: 1, 10 
Fc: 0.1, 1
Response Time<1 sec.
Sensor TypePhoto diode & color correction filter
Display5-digit LCD
Data HoldYes
Auto ZeroYes
Overrange IndicatorYes
Sampling Rate1 time/sec.
Internal MemoryYes
Auto Shut-offYes (after 10 mins)
Low Battery IndicatorYes
Power Supply9V battery
Product CertificationsCE
Operating Temperature32 to 122°F (0 to 50°C)
Storage Temperature14 to 140°F (-10 to 60°C)
Operating Humidity Range10-80%
Dimensions6.1 x 2.4 x 1.3" (156 x 60 x 33mm)
Weight5.6 oz (160g)