Optimization of a spectrally tunable LED daylight simulator

Minchen Wei, Biao Yang, Yandan Lin

Research output: Journal article publicationJournal articleAcademic researchpeer-review


Daylight simulators (i.e., D50, D55, D65, and D75 simulators) play an important role for industrial applications, such as surface color industry, recipe formulation, and graphic arts industry. Conventional light sources, including xenon lamps, tungsten-halogen lamps, and fluorescent lamps, have been used as daylight simulators. In this article, a genetic algorithm is employed to investigate optimized channels for each daylight simulator. It is found that at least six LED channels are required to produce high quality daylight simulators in terms of the CIE Metamerism Indices. Furthermore, it is possible to create a spectrally tunable daylight simulator using six LED channels with wavelengths of 357, 420, 474, 533, 595, and 660 nm. This wavelength combination with appropriate intensity combinations can produce D50, D55, D65, and D75 simulators with good performance, in terms of the CIE Metamerism Indices. The color appearance of various color samples or objects under such a daylight simulator is found to be very similar to those under a corresponding daylight illuminant. Col Res Appl, 42, 419–423, 2017.
Original languageEnglish
Pages (from-to)419-423
Number of pages5
JournalColor Research and Application
Issue number4
Publication statusPublished - 1 Aug 2017


  • CIE Metamerism Index
  • daylight simulator
  • spectral optimization
  • spectrally tunable LED

ASJC Scopus subject areas

  • Human Factors and Ergonomics
  • General Chemistry
  • General Chemical Engineering


Dive into the research topics of 'Optimization of a spectrally tunable LED daylight simulator'. Together they form a unique fingerprint.

Cite this