Gap Sleep Gap 5: We need to identify environmental specifications and operational regimens for using light to prevent and mitigate health and performance decrements due to sleep, circadian, and neurobehavioral disruption, for flight, surface and ground crews, during all phases of spaceflight operations.
Last Published:  07/31/19 10:05:30 AM (Central)
Responsible Element: Human Factors and Behavioral Performance (HFBP)
Status: Open
Description

a)    Initial State

NSBRI and BHP supported research has helped inform the optimal use of light (timing, duration, intensity, and spectral power distribution) as a countermeasure. As a result of these studies, recommendations have been provided for the ISS vehicle, and an evidence-based flexible lighting system will be implemented starting in 2015. Planned research will help to validate recommended protocols for this system. Additional work is needed however to help develop individualized protocols for using light.

b)    Target for Closure

An identified set of validated lighting countermeasure regimens that integrate lighting properties (timing, duration, intensity and spectral power distribution) to provide:
(1) Individualized operational protocols that optimize countermeasure effectiveness;
(2) Hardware specifications for future vehicles that enable a flexible lighting system for autonomous, long duration and/or distance exploration missions.

c)    Metrics for Interim Progress

(1) Conduct laboratory investigations evaluating the effect of varying light sources on sleep, circadian rhythms, and performance (25%);
(2) Develop initial protocols for testing the use of light on ISS (in-house and current NSBRI investigation) (2%);
(3) Implement study on ISS to validate lighting protocols with ISS flexible lighting system (starting 2015), assessing lighting protocol effects on performance through biomarkers identified in Sleep Gap 4 (25%); Capture ‘lessons learned’ from lighting countermeasure in space, for future vehicles (5%);
(4) Conduct Lighting Workshop to further define needed research & technology development for light in exploration class vehicles (3%);
(5) Evaluate neurobehavioral effects of light and new lighting systems in laboratory & analog research to further the use of light as a countermeasure for long duration exploration missions (also for the Bmed risk) (25%);
(6) Enhance predictive models that integrate lighting properties (intensity, duration, timing) to also include spectral power distribution (10%);
(7) Provide updated information to NASA medical operations and habitat designers regarding new evidence and enhanced lighting requirements that can optimize effectiveness and minimize crew resource requirements (5%);
(8) Update requirements and clinical guidelines, as appropriate, for using light as a countermeasure for sleep loss, circadian misalignment, and performance (and a clinical countermeasure – Bmed) (ongoing).

d)    Approach

NASA and NSBRI have invested in (1) and (2), and as a result an ISS countermeasure will be implemented. The field is young however and more efficient uses of light (e.g., less power, crew time) should be determined for exploration. BHP will remain connected to those in the circadian, sleep, and photobiology communities to understand what other agencies’ investigations are funding and how the science funded externally can inform NASA efforts.

Target for Closure
No Target for Closure available.
Mappings
Risk Risk of Performance Decrements and Adverse Health Outcomes Resulting from Sleep Loss, Circadian Desynchronization, and Work Overload
You are here! Gap Sleep Gap 5: We need to identify environmental specifications and operational regimens for using light to prevent and mitigate health and performance decrements due to sleep, circadian, and neurobehavioral disruption, for flight, surface and ground crews, during all phases of spaceflight operations.
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