• Ranges:
    • 20, 200, 2000, 20000, 200000 lux
    • 20, 200, 2000, 20000 foot candles
  • Accuracy:
    • ±3% (Cal. to std. incand. lamp at 2854°K)
    • 6% other visible light sources
  • Resolution: 0.01 fc/lux
  • 3-3/4 digit LCD display
  • Sampling rate: 2.5 times/sec


The Amprobe LM-120 light meter with auto-ranging measures the visible light from fluorescent, metal halide, high pressure sodium or incandescent sources. It is a portable, easy-to-use meter designed to allow users to reduce the energy burden of a building by increasing the efficiency of its lighting system. With the LM-120, users can quickly determine the indoor illumination level and adjust the output level of lighting fixtures accordingly.

The Amprobe LM-120 displays light levels in either Lumen (lux) or footcandle (fc) units. The unit can be selected by a switch on the front panel. LM-120 meters have a reliable silicon photodiode sensor and filter and includes ranges up to 20,000 fc or 200,000 lux with an accuracy of ±3% and a resolution of 0.01 fc/lux. This meter is autoranging plus manual ranging with the ability to zero out the reading before taking a measurement. The data hold feature can be used to freeze readings on the digital display while the MIN/MAX function shows high and low readings. The meter also has an auto power-off to save battery life.


This product can be used in the following applications: