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. Author manuscript; available in PMC: 2020 Apr 1.
Published in final edited form as: J Biol Rhythms. 2019 Mar 1;34(2):195–204. doi: 10.1177/0748730419830013

Table 3.

Mean absolute baseline melatonin levels at S1

Study variable Study phase
Phase 1 (high light level) Phase 2 (low light level)
Experimental condition Dim light 3000 K 3000 K mod Dim light 3000 K 3000 K mod
Mean ± SD melatonin level (pg/mL) 9.0 ± 5.1 10.5 ± 6.2 10.2 ± 5.1 12.0 ± 9.1 11.8 ± 8.1 11.6 ± 9.0