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. 2015 Jun 18;5:11325. doi: 10.1038/srep11325

Table 1. The figures of merit for the optical and circadian properties of displays.

Quantity   Symbol
Color quality Color coordinates (CIEx, CIEy) Inline graphic
  Correlated color temperature (CCTs, K) Inline graphic
  Color gamut Inline graphicx100 Inline graphic), Inline graphic)Inline graphic, Inline graphic))
Vision performance Luminous efficacy of radiation (LER, lm/W) Inline graphic
  Luminous efficacy (LE, lm/W) Inline graphic
  Photopic Illuminance (PIL, lx) PIL (lx, lm/m2) Inline graphic
Circadian performance(melatonin suppression) Circadian luminous efficacy of radiation (CER, blm/W) Inline graphic
  Circadian action factor (CAF, blm/lm) Inline graphic
  Circadian Illuminance (CIL, blx) CIL (blx, blm/m2) = PIL (lx, lm/m2) x CAF (blm/lm)

Inline graphic NTSC color coordinates B(0.14, 0.08), G(0.21, 0.71), R(0.67, 0.33). EQE = External quantum efficiency. J(λ) = Spectral power distribution of the radiation (power per unit wavelength), in watts per meter.