Amprobe LM-100 light meter measures the visible light from fluorescent, metal halide, high-pressure sodium or incandescent sources. It is a portable, easy-to-use digital light meter designed for simple one-hand operation reading in Lumen (lux) or footcandle (fc) units. The LM-100 measures a wide range of light up to 20,000 fc or lux with an accurate, high resolution of 0.01 fc/lux. Use the LM-100 light meter to measure the illumination level in the interior and to switch off or reduce or increase the output level of lighting fixtures. Reduce the energy burden of the building by significantly increasing the efficiency of its lighting system.
The LM-100 Light Meter measures visible light from fluorescent, metal‑halide, high‑pressure sodium or incandescent sources. It offers one‑hand operation and can display readings in lux or footcandles, helping users assess and adjust interior lighting for energy efficiency.
Key features include a 3¾‑digit LCD, data‑hold, min/max recording, protective sensor cap, and a silicon photodiode sensor. The device operates from a 9 V battery with up to 200 hours of life and is rated for temperatures from –10 °C to 50 °C.
| Measurement Range | 20,000 lux or footcandles |
|---|---|
| Resolution | 0.01 fc/lux |
| Accuracy | ±3% (incandescent) / 6% (other visible sources) |
| Display | 3¾‑digit LCD (max 1999) |
| Sampling Rate | 2.5 times per second |
| Power Supply | 9 V battery (NEDA 1604) |
| Battery Life | 200 hours |
| Operating Temperature | -10 °C to 50 °C |
| Weight | 220 g |
| Base Dimensions | 130 × 63 × 38 mm |
It can measure illumination up to 20,000 lux or footcandles.
The meter is ±3 % accurate for incandescent sources and ±6 % for other visible light sources.
The built‑in 9 V battery provides about 200 hours of operation.
Press the Data Hold button to freeze the current reading on the display.