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Table 1 Characteristics of organic light-emitting diode (OLED) lights used in this study

From: Exposure to blue light during lunch break: effects on autonomic arousal and behavioral alertness

  Blue Orange
Illuminance, lx 12.9 17.7
Irradiance, μW/cm2 8.02 6.54
Chromaticity (x, y) 0.14, 0.16 0.56, 0.42
Weighted mean wavelength, nm 485 622
PFD, μmol/m2/s 0.323 0.333
Melanopic PFD, μmol/m2/sa 0.225 0.026
Relative melanopic content, % 69.6 7.9
  1. PFD photon flux density
  2. aCalculated from melanoptic spectral efficiency adjusted for human pre-receptoral filtering [13, 14]