Table 2 Simulated light scenarios.

From: The interindividual variability of sleep timing and circadian phase in humans is influenced by daytime and evening light conditions

Scenario

Time interval

Illuminance (lx)

A. Long day, constant light (LD 16:8, Fig. 1a)

07:00–23:00

0 up to 10,000

23:00–07:00

0

B. Short day, constant light (LD 10:14, Fig. 1b)

09:00–19:00

0 up to 10,000

19:00–09:00

0

C. Long day with 20 lx evening light (Figs. 2 and 3)

Wake-19:00

0 up to 10,000

19:00-sleep

15

D. Long day varying evening & daytime light exposure (Figs. 4, 5 and 6)

Wake-19:00

200, 800. 2000

19:00-sleep

0 up to 150

E. Natural light scenario (LD 14.5:9.5)

06:00–20:30

4500

20:20–06:00

0

F. Electrical-lighting in the constructed environment

Wake-09:30

100

09;30–14:30

1000

14:30–19:00

100

19:00-sleep

20