Target illuminance (lux)

Measured illuminance (lux)

Measured irradiance (W/m2)

CLA

CS

8

8.15 +/- 0.12

0.0252 +/- 0.00037

5.65 +/- 0.085

0.7

22

22.0 +/- 0.23

0.0682 +/- 0.00071

15.5 +/- 0.16

2.2

60

60.0 +/- 0.48

0.190 +/- 0.0014

42.4 +/- 0.34

6.1

200

200 +/- 1.5

0.621 +/- 0040

141 +/- 1.1

19

720

720 +/- 3.6

2.23 +/- 0.010

509 +/- 2.5

42

Table 1: Target (photopic) corneal illuminance levels (lux) used in the study together with the measured corneal illuminance (lux) and irradiance (W/m2) levels. Measured levels of Circadian Light (CLA) and consequent values of Circadian Stimulus (CS) from equation 1 are also shown.