Goniometer, Portable, LightSpion TM

Manufacturer's part number :


Manufacturer Viso Systems

Viso Systems

Description :

Simply measure beam angle, lumen, cri, colour temperature and lumen per watt with no expert knowledge required. The system is comprised of full spectra spectrometry and a 50K/sec sample power analyser giving you a professional measurement. The LightSpionTM comes with the “Viso Light Inspector” software that connects via USB to your computer.

EU Regulation EU No 1194/2012 requires directional light sources luminous flux to be measured within 90° or 120° cone. Luminous flux measurement is normally done at full 360° in all direction. But the new EU Regulation EU No 1194/2012 require that directional lamps are measured in a 90° or 120° cone, meaning that only light illuminated in the cone is calculated efficient luminous flux.

The Viso Light Inspector software v4.2 now supports limited spherical measurements making it easier than ever to test your light sources against the new standard.

View our wide range of Spectroscopy products

View our portfolio of Photonics

See all products from our supplier Viso Systems

  • Quote and availability


    • Weight: 5 Kg
    • Dimensions: 41x28x10cm
    • Power range: 90-280VAC
    • Maximum light source power: 4Amp (880W@220V,440@110V)
    • Measures: Lumen, Peak candela, CRI, Colour Temperature, Lumen/Watt, power and Power Factor.
    • Wide lumen range: 10 lm to 10000lm
    • Maximum lightsource size: 80mm (diameter)
    • Pre-calibrated plug & play solution
    • Software Compatible with: Windows 2000, XP, 7 32bit – 64bit


    • Measure in 30 seconds: Lumen, peak Candela, Colour temperature, CRI, Beam angle, Angular field distribution, Power, Power factor, Lumen per Watt
    • Supports new EU regulation No 1194/2012

    LightSpionTM Goniometer Video

    LightSpionTM Goniometer
    LightSpionTM Goniometer

Ask our team of experts

Read our FAQs below, and submit your own.

    How do I calculate UGR values in Light Inspector software?

    At present, the Light Inspector software does not calculate the UGR values itself. In order to figure out the values you can use another open source software, for example LDT Editor. UGR values depend on the placement of an observer. The LDT Editor offers a table with multiple positions for an observer as an overview of how the UGR values change relative to position. Therefore the angular intensity distribution needs to be symmetric for their algorithm to work. If your light source doesn’t have a symmetric distribution, you can make an adjustment in the Light Inspector software (Edit -> Photometric -> Corrections -> Correct Asymmetry). Export your measurement then in an LDT format and open it in the LDT Editor. The table with UGR values is shown under Light Distribution tab. Additionally you can calculate the exact UGR values for a specified observer's placement in Dialux.

    Expert: Cécile Mercusot

  • New question? Ask the team