The Gamma Scientific model RS-15 Total Flux Calibration Light Source is a precision source of total radiant flux, used primarily to calibrate integrating spheres, light measuring instrumentation and as stimuli to measure detection devices. Lamps are available from 5W – 75W. The RS-15 source may be used as a standard of spectral radiant flux or luminous flux, traceable to the National Institute of Standards Technology (NIST).

To maintain almost constant radiant flux output, the RS-15 utilizes a tungsten halogen lamp. The system can be coupled with our model RS-4, ultra-stable constant-current supply, with integral precision shunt current measurement and comparison circuits.


  • Integrating Sphere, Spectroradiometer, Photometer and Radiometer calibration
  • SSL  and LED test & measurement
  • CCFL measurements
  • Total flux measurements
  • Luminaire testing