Figure 2
From: Red light at intensities above 10 lx alters sleep–wake behavior in mice
Episode number, mean duration (a–c), stage transition (d–f) and EEG power density of NREM sleep (g–i) during 5-h light-on phase. Black, white and red bars show the profiles of continuous darkness, white and red light treatments, respectively. Values are means±SEM (100 lx, n=9; 30 lx, n=5–7; 20 lx, n=5, 6). *P<0.05, **P<0.01 compared with continuous darkness, assessed via one-way ANOVA followed by a Bonferroni test. Blue and red horizontal bars indicate the location of a statistically significant difference (P<0.05, two-tailed unpaired t-test) between white or red light and continuous darkness, respectively. R, REM sleep; S, NREM sleep; W, wake.
