User preferences for LED lighting in terms of light spectrum

@article{Islam2013UserPF,
  title={User preferences for LED lighting in terms of light spectrum},
  author={MS Islam and Rajendra Dangol and Mikko Hyv{\"a}rinen and Pramod Bhusal and Marjukka Puolakka and Liisa Halonen},
  journal={Lighting Research \& Technology},
  year={2013},
  volume={45},
  pages={641 - 665}
}
A study was carried out in light booths to investigate user preference for different light spectra. Twenty-one LED spectra and three fluorescent lamps, all at three different correlated colour temperatures were used for the study. Sixty observers evaluated the lit scenes under different spectra for naturalness of selected objects, colourfulness of a Macbeth Colour Checker Chart, and the visual conditions of the lighting booths. The observers preferred the spectral power distributions (SPD… 

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