. Author manuscript; available in PMC: 2020 Apr 1.

Published in final edited form as: J Biol Rhythms. 2019 Feb 25;34(2):178–194. doi: 10.1177/0748730419828056

Table 1.

Mean ± standard deviation (SD) photopic illuminances (in lux) obtained during the study days using the spectrometer and the corresponding predicted CS values obtained using the spectrometer data and the Rea et al. model of circadian phototransduction (Rea and Figueiro, 2018).

Target CS	White light spectrum	Adolescents		Adults
Target CS	White light spectrum	Photopic Illuminance (lux)	Predicted CS^a	Photopic Illuminance (lux)	Predicted CS^a
0.07	2700 K	53 ± 9	0.06 ± 0.01	56 ± 13	0.07 ± 0.01
0.07	6500 K	32 ± 4	0.06 ± 0.01	31 ± 5	0.05 ± 0.01
0.14	2700 K	100 ± 26	0.11 ± 0.03	109 ± 17	0.12 ± 0.02
0.14	6500 K	62 ± 5	0.11 ± 0.01	66 ± 10	0.11 ± 0.02
0.30	2700 K	282 ± 51	0.27 ± 0.06	290 ± 39	0.27 ± 0.05
0.30	6500 K	195 ± 35	0.27 ± 0.06	213 ± 49	0.29 ± 0.08
0.50	2700 K	747 ± 102	0.45 ± 0.12	773 ± 116	0.45 ± 0.13
0.50	6500 K	467 ± 65	0.44 ± 0.11	536 ± 84	0.47 ± 0.14

Note:

^(a)

The predicted CS values are based on a 1-h exposure.