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. 2013 Aug 1;36(8):1239–1246. doi: 10.5665/sleep.2894

Figure 1.

Figure 1

Partial raster and schema of study procedures on light exposure (LE) days. (A) The 32-day inpatient protocol included 2 experimental LE of 90 lux illuminance and 6.5 h in duration. Each LE was preceded by 3 days of either 1 lux (gray) or 90 lux (white) ambient light during the 16-h wake episodes. On LE days the wake episode lasted 26 h and included a 14-h constant posture (CP). All sleep episodes were in complete darkness (black). (B) Collection of measures during the LE day included melatonin sampling (30-60 min), waking EEG recording, and neurobehavioral performance testing (30-60 min; dashed line).