The problem
You don't always know what went wrong.
Light shapes space. It directs attention, sets mood, defines how a room feels to everyone inside it. Getting it right takes years. Losing it takes one bad batch of fixtures. What lands on site is rarely what was designed on screen. Colours drift. Fixtures clash. That gap between intention and installation is a measurement problem. The tools to solve it have never existed — until now.
Now you know exactly what went wrong.
[GM-100] is the first portable light meter built for how lighting designers actually work. It measures illuminance, CCT, SDCM, CRI, and full spectrum — on site, in real conditions, with lab-grade accuracy that doesn't drift. A companion app captures and organises every reading by fixture, room, and project. And for deeper qualification, Smart Stage provides a controlled rotating base for angular light profiling.
Accurate. Stable. Portable.
GM-100 pairs a novel spectral chip with AI-powered algorithms to deliver lab-grade measurement of illuminance, CCT, SDCM, CRI, and full spectrum — in your hand, on any site, in any condition. Built for lighting designers and engineers who need to know exactly what their fixtures are doing, before the client walks in.
Key measurements
Colour
Distribution
Consistency
Every fixture makes a promise. A colour temperature. A rendering quality. A spectral character. GM-100 measures whether it keeps it.
Illuminance tells you how much light is present. CCT tells you whether it reads warm or cool. CRI tells you how faithfully it renders the colours of everything it touches — skin, stone, fabric, art.
Full spectral analysis, across the complete 380–780nm visible range, shows you the fingerprint behind the number. Not just a score.
The whole truth. Delivered at Δxy < 0.002 — the accuracy of a laboratory spectrometer. In your hand.
Consistency
Distribution
Consistency
One accurate measurement is the start. What determines the quality of a space is whether every fixture matches every other.
SDCM — Standard Deviation of Colour Matching — measures the distance between a fixture's actual white point and the reference it was specified to hit. Within two steps, the difference is imperceptible. Beyond four, it's visible to anyone who walks in.
GM-100 lets you set your exact reference point before you measure, then tells you precisely where each fixture lands.
Distribution
Distribution
Distribution
Centre performance is only part of the story. What happens at the edge of the beam — the colour shift across the angle, the way intensity falls — is what separates a space that feels considered from one that doesn't.
Paired with SmartStage Rotater, GM-100 measures angular distribution and spectral consistency across the full beam profile.
Key Features
Lab precision. Real world cost.
Lab precision. Real world cost.
Lab precision. Real world cost.
GM-100 delivers lab-grade accuracy through three things working together: a cutting-edge spectral sensor, individual unit calibration, and AI-powered algorithms.
Individual unit calibration
Lab precision. Real world cost.
Lab precision. Real world cost.
Every GM-100 is factory-calibrated individually against a traceable reference standard. Your unit was verified. Your readings can be trusted.
On-device processing
Built for the complete workflow
Built for the complete workflow
Every calculation happens on the device. No cloud, no lag, no dependency on a live connection. Quad-core ARM Cortex A72 · 1.5GHz · 2GB RAM · 8GB eMMC
Built for the complete workflow
Built for the complete workflow
Built for the complete workflow
The companion app organises every reading by fixture, room, and project. Smart Stage extends measurement to angular profiling and beam qualification. Measurement, record, report — one system.