The portable Viso LightSpion® enables you to fully measure any light source of up to 8 cm in diameter within 30 seconds. It measures all of the photometric data and no expert knowledge is required. The LightSpion can even be used outside of a laboratory or dark room, making it a great tool for on-site inspections and also to empower your sales force.


The systems consists of a pre-calibrated spectrometer operating in the visible light range 360-830 nm, and a goniometer. The LightSpion measures the full spectrum from a light source and collects a full 360° photometric field distribution in two c-planes. Then the device calculates CRI, color temperature and a complete luminous flux in lumen. A built-in high-speed 70 K/sec power analyzer measures voltage and current and instantaneously presents precise information about power consumption, by calculating the light efficiency in lumen/watt.


The LightSpion® suitcase is easily connected to your computer via a USB connector.  Included with the LightSpion is the Viso Light Inspector software that is available for downloading from our website. The user interface displays the measured data in a clear and simple way, while also allowing for more detailed investigation of the obtained data.

light-measurement-software  Viso Light Inspector Pdf

The LightSpionTM supports the new EU regulations (EU No 1194/2012), which require directional lamps to be measured in a 90° or a 120° cone. A mere selection of the measurement cone of either 90° or 120° sets the automatic calculation. You are then able to insert your own logo into the data files. The measurements are exported to a variety of data formats for the convenience of lighting technicians and designers: IES, LDT, PDF, PNG or CVS.  You can also then add a photo into the report by taking a webcam image of the measured light sources or inserting existing images into the data files which saves time when searching for a particular measurement. In addition, you can email the measured data files directly – a truly useful software feature, which releases any hassle from handling data storage. Measuring light with the LightSpionTM is simply the easiest way to measure and create reports. The technology contained within the LightSpion allows for high accuracy measurements of luminous flux in lumen. Learn more about the accuracy of the flux measurements here.
An additional feature of the LightSpion is that it is now possible measure linear light sources like LED tubes and strips. The procedure is simple: place the linear light source on the goniometer, insert the length of the source into an appropriate software window and begin your data acquisition. Find more information about the exact setup in the user manual.


The LightSpion portable goniometer system has been tested and verified by the Department of Photonics of the Technical University of Denmark (DTU). Click below to read the full report.


Click here to try the Viso Light Inspector software and get full LightSpion documentationClick large and download


  • Weight……………………………5 kg
  • Dimensions………………………41x28x10 cm
  • Power range……………………90-280 VAC
  • Maximum light source power…3 Amp (660 W @220 V, 330 W @110 V)
  • Measures…………………………Lumen, Peak candela, CRI, Colour Temperature, Lumen/Watt, power and Power Factor.
  • Wide lumen range………………10 lm to 10,000 lm
  • Maximum light source size……80 mm (diameter)
  • Pre-calibrated plug & play solution

Software specifications:

Compatible with: Windows 2000, XP, 7 32bit – 64bit
Save or email any measurements
Detailed power analysis with power scope
Automatic light gain control
Realtime spectra and power update for quick analysis
Attach one or more pictures to your measurements
Use web-cam to snap picture as quick reference

Click here for more specifications


The case is 5 kg, making it exceptionally light-weight and, in addition, the case is watertight.


The LightSpion has a built-in power analyzer that gives you information instantly.


Quick and easy, the system is pre-calibrated and ready to use.


Essential measurement data displayed in real time: Lumen, Lumen/Watt, Candela, CRI, Power and PF.


With a spectrometer sensor that gives you all photometric data in one system.


 Product Leaflet

Accuracy report

User manual

 User manual – Light Inspector software


 Full product line brochure

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