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Table 1 Characteristics of light sources

From: Human pupillary light reflex during successive irradiation with 1-ms blue- and green-pulsed light

Light source

Blue

Green

Peak wavelength (nm)

466

527

FWHM (nm)

22

29

Photopic illuminance (lx)

15

105

Scotopic illuminance (lx)

226

241

Irradiance (μW/cm 2 )

20

19.1

Photon density (10 12 photons/[cm 2 s])

47.3

51.2

Photon density (log photons/[cm 2 s])

13.7

13.7

Melanopsin-stimulating photon density (10 12 photons/[cm 2 s])

39.6

25.7

  1. FWHM full width at half maximum