Measuring LED and other LIGHT SOURCES

Data sheets for LED components (SMD, COB) includes lots of information about the emitted light. Goniometers from Viso Systems capture all information when measuring LED and other light sources. The Viso Light Inspector software is the strongest and most intuitive light measurement software solution in the market. For instance, the user-friendly dashboard provides you with a perfect overview of your measurements – and in real-time. The software handles automatic goniometer setup and measurement. Furthermore, the Light Inspector has extensive output options and connect directly to MATLAB, LabVIEW, etc.

GETTING your own lab

The Viso BaseSpion system is especially well suited to measurement of RGB LEDs, COB LEDs and SMD LEDs. Fast spectrometer sensors is the technology behind all Viso light measurement systems. Hence, all data is based on full-spectrum goniometer measurements. In addition, measuring is fast: One full plane (= two C-planes) in a 5° resolution is measured in just 20 seconds. As all data is generated by the Viso system, there is no need for subsequent integrating sphere measurements.

The portable LightSpion is an excellent choice for measuring LED components as well as round-symmetrical small light sources such as household light bulbs.

LED components

Your business

LED components and modules

COB (Chip-on-board) solutions

LED strips

Household light sources

Conventional light sources


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Measuring LED: Basic outputs

Measuring LED Light distribution curve

Light distribution curve
Measuring LED in great detail  is no problem. With up to 72 C-planes and up to 0,1 degree gamma resolution, there is data in abundance to plot. 3D plots are included as well

light measurement system

As light is detected with a Viso fast spectrometer sensor, spectral data is recorded in every measurement. A Viso goniometer will even provide ‘color over angle’ data (not possible with an integrating sphere) 

CIE 1931 color coordinate plotCIE 1931 color coordinate plot

CIE 1931 color coordinate plot
The integrated spectrum can be plotted in a CIE 1931 x,y-diagram. Provide your color target, and the color difference (Duv) and the SDCM value (MacAdam steps) are prompted

Power curve from light measurement

Power characteristics 
All Viso goniometers have a built-in power analyzer. The analyzer will help you to determine when light sources are stabilized. Important power data (wattage, efficacy, power factor etc.) are standard

Further outputs

Fundamental radiation data

  • Total lumen
  • Peak Candela
  • Beam angle
  • LOR Up/Down
  • Polar light distribution curves
  • Linear light distribution curves

Color and color deviation data 

  • CCT / Correlated Color Temp. [K]
  • CRI / Color Rend. Index / Ra (1-14)
  • TM30-18 indices and graphics
  • CQS index and graphics
  • CIE 1931 x,y-diagram and Duv
  • SCDM (MacAdam steps)

Lighting design and data export

  • UGR table
  • Isolux/iso-candela plots
  • BUG rating
  • Full raw data export to MS Excel etc.
  • Optional web-based tracking system
  • Customizable PDF reports

Power and warm-up data

  • Wattage [W]
  • Current [A] and voltage [V]
  • Mains frequency [Hz]
  • Current and voltage THD [%]
  • Warm-up time and variation
  • Automatic stabilization

Popular additions

Add great tools to your system, capture more data and ease your work

The LabFlicker instrument records all contemporary TLAs (temporal light artifacts): Flicker and stroboscopic effects including PstLM. LabFlicker connects to all Viso systems

Add a LabTemp 3-port temperature probe system for monitoring ambient lab temperature and 3 temperature spots

Upgrade your existing sensor to provide a broader measurement range (e.g. UV) or a wider sensitivity ranges