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. Author manuscript; available in PMC: 2016 Mar 14.
Published in final edited form as: Sleep Health. 2015 Mar 1;1(1):75–82. doi: 10.1016/j.sleh.2014.12.009

Figure 1.

Figure 1

Active light was delivered through closed eyelids during sleep using a light mask. The light mask contained two blue LED arrays (λmax = 480 nm, FWHM = 24 nm), one for each eyelid.