LIDlight light meter in action: image-based luminance meter as a tunnel lighting measurement tool in action.

Image-Based Luminance Meter for Fast Precision

Image-based luminance meter

ILM: The Image-Based Luminance Meter for Precision Engineering

Unlock precision with the ILM by LIDlight. Tailored for engineers, this tunnel luminance analyzer measures luminance in tunnels and roads, meeting CIE 140, EN 13201 and CIE 88 standards. With fast, reliable data, ILM ensures safety and efficiency, redefining luminance measurement for infrastructure projects. Whether optimizing tunnel entrances or road signage, ILM delivers cutting-edge solutions.

High Precision

The ILM achieves ±2% accuracy at 2856K, adhering to CIE standards like CIE 140, CIE 88 and EN 13201. It ensures reliable luminance data for tunnels and roads every time.

Custom Expandability

The ILM offers tailored functions to meet your unique project needs—from tunnel systems to road signage—enhancing flexibility without complexity.

Lightweight Portability

Weighing just 623g, this road luminance meter is as portable as a camera, designed for effortless use in the field or lab, anytime, anywhere.

One-Shot Efficiency

With single-shot measurement, the ILMcaptures all luminance data instantly, streamlining optimization for lighting fixtures and infrastructure projects.

Luminance Measurement

66%

Faster Tunnel Measurement

55%

Quicker Luminaire Checks

Schréder boosting tunnel inspection efficiency by 66% with LIDlight’s light meter solutions: LuxSeeker and image-based luminance meter.
Lighting Solution Manager

The tunnel luminance analyzer ILM cut measurement from 9 days to 3, saving 66% time per CIE 140—accurate and efficient.

The luminaire verification meter ILM pre-tests fixtures in one shot, 50% faster with cosine correction—precise and simple.

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Lighting Engineer

Wireless Transmission

ILM enhances flexibility with optional wireless transmission. Equipped with a Wi-Fi module and POE Sidekick, this road/tunnel luminance tool connects seamlessly to devices for easy setup and control. Whether measuring luminance in tunnels, roads, or large luminaires, the ILM simplifies workflows in expansive settings, boosting efficiency for engineers.
Engineer using ILM, an image-based luminance meter, with Wi-Fi and POE Sidekick for tunnel and road luminance testing.

Tunnel entrance Luminance Meter

Smart Tunnel Lighting System x Signify (15 Tunnels)

70%

Energy Savings

10%

Total Cost Savings

Signify using LIDlight’s LuxSeeker Bluetooth light meter and ILM tunnel lighting measurement tool for 15 smart tunnels.
LIDlight Innovative lighting solutions company. From smart lighting & design to advanced light meters and surveillance lighting, we light up lives with sustainable, human-centric technology.
LIDlight ILM gives us the ability to accurately measure tunnel luminance and uniformity to optimize our lighting design and reduce our overall costs. It truly is a game changer.
Sabrina
Signify's Key Account Manager
Find out more
Security + Measurement

Dual Mode

ILM is not just a luminance measurement device, but also a security camera. Under normal conditions, the image-based luminance meter ILM can perform surveillance. When luminance measurement is required, the tunnel entrance luminance meter switches to measurement mode to obtain luminance data and determine if luminaires need replacement, enhancing safety and maintenance efficiency.
Applications

Outdoor

Engineer testing roadway luminance with the image-based luminance meter ILM as a road luminance meter.
Tunnel2
Setup
Results

Tunnel

Engineer testing roadway luminance with the image-based luminance meter ILM as a road luminance meter.
False color image of roadway luminance results from ILM, a road luminance meter, meeting EN 13201/CIE140.
Setup
Results

Roadway

Engineer measuring building luminance using the image-based luminance meter ILM in real-time.
False color image displaying building luminance data from ILM, an image-based luminance meter.
Setup
Results

Building

Engineer assessing sign luminance with the image-based luminance meter ILM for visibility.
False color image of sign luminance results from ILM, a road luminance meter, for safety.
Setup
Results

Signs

indoor

Engineer testing luminaire luminance with the image-based luminance meter ILM as a luminaire verification meter.
False color image showing luminaire luminance results from ILM, a luminaire verification meter.
Setup
Results

Luminaire

Engineer measuring optical luminance using the image-based luminance meter ILM with precision.
False color image of optical luminance data from ILM, an image-based luminance meter.
Setup
Results

Optical

Engineer testing backlight luminance with the image-based luminance meter ILM for uniformity.
False color image showing backlight luminance results from ILM, an image-based luminance meter.
Setup
Results

Backlight

Engineer assessing indicator luminance with the image-based luminance meter ILM in real-time.
False color image of indicator luminance results from ILM, an image-based luminance meter.
Setup
Results

Indicator

Technical Data

Product DescriptionLuminance RangeVaried Focal LengthField of ViewView Angle (Software)Luminance AccuracyLuminance LinearityLuminance RepeatabilityInterface
ILM-300.1-50,000 nitf=2.8-8mm (F1.2-F1.95)114°/51°(Horizontal)
84°/39°(Vertical)		–±3% (@2856K)±3%2%Gigabit Ethernet
Interface
ILM-L200.1-10,000 nitf=2.8-8mm (F1.2-F1.95)114°/51°(Horizontal)
84°/39°(Vertical)		1°-70°±3% (@2856K)±3%2%Modbus RTU via RS485
ILM-L20-se1-5000 nitf=2.8-8mm (F1.2-F1.95)114°/51°(Horizontal)
84°/39°(Vertical)		10°-50°±3% (@2856K)±3%2%Modbus RTU via RS485

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