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The evening light environment in hospitals can be designed to produce less disruptive effects on the circadian system and improve sleep
Hospital evening lighting designed to reduce disruption of the body’s internal clock and improve sleep
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Abstract
Melatonin levels were 15% less suppressed in a blue-depleted light environment compared to a normal light environment.
- Blue-depleted lighting resulted in a significant 1:20 hour phase advancement of dim light melatonin onset compared to the normal light environment.
- Participants experienced an increase in total sleep time by 8.1 minutes in the blue-depleted light environment.
- Rapid eye movement sleep duration increased by 13.9 minutes in the blue-depleted environment.
- Neurocognitive arousal was lower in the blue-depleted light environment compared to the normal lighting condition.
- No significant differences in subjective sleepiness or side effects were observed between the two lighting environments.
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Key numbers
30%
Melatonin Suppression Decrease
Melatonin suppression was 15% in blue-depleted LE vs. 45% in standard LE (p = 0.011).
8.1 min
Increased Total Sleep Time
Total sleep time was 8.1 min longer in blue-depleted LE (p = 0.032).
13.9 min
Increased REM Sleep Duration
Rapid eye movement sleep was 13.9 min longer in blue-depleted LE (p < 0.001).