LED Test and Measurement

With over 40 years of experience in developing commercial LED testing instruments, Gamma Scientific is trusted by the world’s leading organizations to provide accurate and reliable results.

Gamma Scientific LED testing systems are built around high performance spectrometers that have been engineered to produce accurate, repeatable measurements in the most demanding production line environments.

With near real-time measurement and powerful analysis software, Gamma Scientific systems are designed to handle 24 hour operation on the production floor. Multiple configurations cover a wide spectral range from ultraviolet to near infrared, and are easily customized to match unique testing requirements.



The Standard in LED Testing Instruments for Over 40 Years

  • Gamma Scientific instruments have been used for LED testing since 1973, when photometers from Gamma Scientific were used by Hewlett Packard to accurately measure optical properties of Red LEDs
  • Gamma Scientific developed the first high-performance, computer controlled spectroradiometers for LED testing
  • Instruments from Gamma Scientific were used in the invention and development of OLEDs
  • Gamma Scientific has been designing integrating spheres since the 1960s
  • The Gamma Scientific Laboratory is accredited by NVLAP (NVLAP Lab Code 200823-0) for Energy Efficient Lighting Products (including LM-79 and LM-80) in accordance with ISO-IEC 17025
  • Gamma Scientific supplies national metrology institutes (NMI’s) with reference detectors that are used as working standards
  • LED test instrument calibration is performed at Gamma Scientific’s accredited laboratory using NIST traceable standards

Spectral Sphere Systems

The Easiest Way to Achieve Accurate LED Measurements

New Spectral Sphere Systems from Gamma Scientific make it simple for you to instantly capture accurate LED measurements. Spectral Sphere Systems are uniquely designed for easy integration with your production lines or as stand-alone LED test systems for R&D and QA applications.

Combining RadOMA-LED spectroradiometers and Gamma Scientific integrating spheres, Spectral Sphere Systems produce highly repeatable and precise measurements of total luminous flux and total spectral flux.

RadOMA Spectroradiometers

Your Solution for More Accurate LED Measurements

As the inventors of the first high-performance, computer-controlled LED spectroradiometers, Gamma Scientific has continued to set the standard in LED spectroradiometer accuracy and reliability. RadOMA spectroradiometers are trusted by the world’s leading organizations.

RadOMA-LED spectroradiometers feature a proprietary optical design and back thinned CCD technology that provides exceptional low-light measurements, superior blue light region sensitivity and highly accurate measurements of wavelength, color and power.

Original system calibration is performed in Gamma Scientific’s NVLAP accredited laboratory using NIST-traceable standards. RadOMA spectroradiometers can be self-calibrated and do not have to be returned to the factory for calibration.

RadOMA 1190 LED Spectrometers

Precision LED Testing to Fit Your Budget

RadOMA 1190 Spectrometers have been designed to provide maximum performance at an affordable price for industrial grade LED testing applications.

The RadOMA 1190 is a linear CCD spectrometer with near real-time measurement speed and NIST-traceable accuracy.

The spectrometer accepts an SMA905 fiber-optic input that can be connected to an integrating sphere for total flux and CIE127 conditions A and B for intensity measurements.

Integrating Spheres

Custom Configurations for Accurate LED Testing

With over 40 years of experience in designing integrating spheres, Gamma Scientific has the expertise to build custom spheres and sphere systems to meet your testing requirements.

Gamma Scientific Integrating Spheres are available in a wide range of sizes from 25mm to 3m in diameter. Standard configurations are optimized for capturing total flux measurements of LEDs, lamps and luminaires.

All spheres come with either our proprietary polytetrafluoroethylene (PTFE) coating or a specially formulated barium-sulfate coating. The PTFE coating gives >99% reflectance over the UV/VIS/NIR region, and is almost perfectly Lambertian.

940 LED-1250 Goniophotometer

Accurate and Repeatable Spatial LED Measurements

Gamma Scientific’s 940 LED-1250 Goniophotometer is designed to analyze angle dependent spatial radiation properties of your LED luminaires, lamps and modules.

With an angular resolution of 0.01˚ the 940 LED-1250 captures highly accurate and repeatable LED measurements. The 940 LED-1250 is in conformity with CIE, DIN and IES standards.

Optical Integrating Tube

Large Integrating Sphere Performance at a Fraction of the Cost

Gamma Scientific’s new optical integrating tube is an affordable alternative for testing your T8 and T12 lamps up to four feet in length.

Proprietary technology ensures that measurements are as accurate as those from a 2 meter integrating sphere, at less than half the price. The table top system is also portable and occupies a much smaller footprint.

When paired with a Gamma Scientific spectrometer and power supply, the integrating tube can capture complete spectral measurements for tube lamps. Integrating tube systems produce accurate and highly-repeatable measurements.

LED Calibration Light Sources

Spectrally Programmable Digital Uniform Light Sources

Gamma Scientific’s line of calibration light sources combine LEDs with linear programmable drive circuitry and active optical feedback to provide precisely controllable, programmable light output. Eigenlite™ Digital Uniform Light Sources exhibit excellent linearity, repeatability, and long-term stability.

Eigenlite LED Light Sources offer the finest and most versatile controlled light energy technology available. They offer interactive spectral programmability along with NIST-traceable absolute calibrations. Eigenlite™ products save time and money, while reducing the uncertainties associated with the testing and calibration of components and systems.

Gamma Scientific also offers traditional NIST-traceable tungsten-based calibration sources.

NVLAP Accredited Laboratory Testing

The Gamma Scientific in-house laboratory has been accredited by NVLAP under the Energy Efficient Lighting Products Program.

Accreditation includes LM-79 accreditation for Solid State Lighting Luminaires – Total Flux Measurements (Luminous Efficacy) and Solid State Lighting Luminaires –Luminous Intensity Measurements.

Gamma Scientific LED Testing Presentation