Spectrum-controlled LED system for light quality testing

Wafa Imad Ibrahim Abu Fares, Vineetha Kalavally, Nader Karnrani, Jussi Parkkinen

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

2 Citations (Scopus)


A light emitting diode (LED) light source based on Red, Green, Blue (RGB) LEDs is capable of producing high quality white light, albeit with unstable color properties. In this paper, we present a computer-controlled light viewing box which was designed and built to create an environment for RGB-based LED lighting quality investigation. The system contains RGB LEDs, the intensity of which can be controlled individually, lending control over the spectrum in the viewing box. The system is used to test the quality of an RGB-based white light, the spectrum of which is optimized based on its tristimulus values compared with the commonly used CIE reference illuminant-D65. It computes chromaticity coordinates and the key quality indices including the color error of the light source. Using a psychophysical test, the optimized white light is tested for its naturalness, attractiveness, brightness and preference compared to a standard white LED light source.

Original languageEnglish
Title of host publication4th International Conference on Photonics, ICP 2013 - Conference Proceeding
Number of pages3
Publication statusPublished - 2013
EventInternational Conference on Photonics (ICP) 2013 - Melaka, Malaysia
Duration: 28 Oct 201330 Oct 2013
Conference number: 4th
https://ieeexplore.ieee.org/xpl/conhome/6679375/proceeding (Proceedings)


ConferenceInternational Conference on Photonics (ICP) 2013
Abbreviated titleICP 2013
Other2013 IEEE 4th International Conference on Photonics (ICP)
IEEE sponsors:
Malaysia Section PHO Chapter
The scope is technology related to photonics or manipulation of photons which includes laser, optical communication, biophotonics, optical computing, nanophotonics, fiber optics and many more.
Internet address

Cite this