Integrated Quantities

  • Total Luminous Flux [ lm ]
  • Radiant power [ W/nm ]
  • Total Photon Flux
  • PBAR and more.

Colorimetric Quantities

  • Correlated Color Temperature – CCT and Duv
  • Color Rendering Indices – Ra, CRI, R1 to R14, TM-30
  • Fidelity index Rf
  • MacAdam Elypses.
  • Binning
  • Color coordinates

Optional Quantities*

  • Luminous Efficacy [lm/w]
  • Power Factor

10 in stock


Luminous flux & Radiant Power Measurement of LEDs

The GL Opti Sphere 205 offers an automated, easy to use alternative for measuring luminous flux and radiant power of LEDs and other small light sources. All measurements are compliant with the recommendation of the CIE Technical Committee published in the CIE 127:2007 Technical Report.

The intelligent design of the Opti Sphere enables different adapters to be installed and allow measurement of a wide number of light sources. Front emitting diodes conforming to CIE recommendations can be measured at the wall entrance in 2π geometry. Other types of LEDs should be measured at the center of the sphere in 4π geometry. Configure the system as required by your application.

GL Opti Sphere 205 Usage

Simplified Luminous Flux

The Opti Sphere 205 was developed to simplify light measurement for single LED’s and small LED modules. Traditional systems are challenging to use, often sensitive to small physical changes and unintuitive software that make it difficult to obtain consistent results independent of the user. With peripheral integration, automated sequences are possible and make this issue a thing of the past.

Reliable Measurement of Light

Inner walls of the sphere are coated with barium sulfate (BaSO4) which ensures high reflectance properties up to 97%. All GL Optic spheres are universal and can be used with any GL Spectis series spectrometer with a corresponding adapter installed directly on the sphere or via an SMA fiber-optic cable.

GL Opti Sphere 205 Features

Precisely designed aperture

The port of the sphere is equipped with a precisely designed 50mm aperture which can be used in partial flux measurements of LEDs. For this application, the test LED is installed outside the sphere at a defined distance and the flux is measured inside the sphere.

CIE Compliant

Measurement of LEDs compliant with CIE 127:2007 and new CIE S 025/E:2015. This sphere also complies with other global standards and all American IES LM and European EN requirements for professional LED light measurement instrumentation.

Useful Accessories

Appropriate accessories are available for specific measurement purposes. The GL OPTI SPHERE 205 features an auxiliary light source to compensate the self-absorption effect of the test LED.

Automated Self-Absorbance Correction

The integrated LED auxiliary light source is fully controlled by the Spectrosoft software to enable quick corrections and deliver optimal results.

GL Opti Sphere 205 Specifications

Sphere inner diameter 205mm
Entrance aperture diameter 50mm
Outside dimensions 265mm x 270mm x 225mm
Spectral range 340-1700nm (determined by spectrometer)
Material (Sphere / Coating) Aluminum / BaSO4
Auxiliary light source White LED
Weight 3.3kg


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