23 Jan 2023 The BTS256-LED Tester measures luminous flux, illuminance, color quantities and spectra of individual LEDs and traditional light sources. Larger size light sources can be measured by attaching the tester to an external integrating sphere or goniophotometer.
Key components include a built-in 50mm diameter integrating sphere, LED auxiliary lamp for self-absorption correction, electronic shutter for offset compensation and GO BiTec Sensor that houses both a photopic photodiode and a low stray light design spectrometer which work together for accurate flux detection over a wide dynamic range. | 
