Detrimental Effects of Blue Light from Electronics on Sleep

Dec. 3, 2015; 1-2:30 p.m. (ET)

Light isn’t just for vision. In addition to enabling us to see, light is the major synchronizer of our bodies’ circadian rhythms to the local time on earth. Light can also induce an acute alerting effect on people. Lighting characteristics affecting vision are different than those affecting our biological rhythms and our acute alertness. Different types and levels of light can affect a person's ability to see clearly, identify people and objects, and drive safely.

Certain types of light applied at certain times of the day can increase sleep efficiency of older adults and reduce symptoms of seasonal affective disorder, or SAD, felt by many people during winter months. If applied at the wrong time, light can lead to circadian rhythm disruption, which has been linked to increased risk for diseases and disorders. How and when lighting can be used to promote health and well-being of those suffering from circadian disorders will also be discussed.

At the conclusion of this webinar, participants will be able to:

  • Demonstrate understanding of the circadian rhythm by identifying at least three ways to measure it.
  • Identify lighting characteristics that affect shift worker’s circadian rhythm.
  • Analyze symptomology of sleep and circadian rhythm disruption in military settings.


Mariana G. Figueiro, Ph.D., FIES
Professor Lighting Research Center Rensselaer Polytechnic Institute Troy, New York


Cmdr. David Barry, Psy.D.
U.S. Public Health Service Implementation Division Chief Deployment Health Clinical Center Silver Spring, Maryland

Continuing Education

Continuing education credit is available from Professional Education Services Group (PESG). You must register by 3 p.m. (ET) Dec. 3, 2015, to qualify for the receipt of continuing education credit.

The awarding of continuing education credit is limited in scope to health care providers who actively provide psychological health and traumatic brain injury care to U.S. active-duty service members, reservists, National Guardsmen, military veterans and their families.


Sign up for the webinar at Please note, registration is required for each webinar regardless if the participant has an existing PESG account. Upon completion of registration, a confirmation email will be sent providing webinar event details.

Once registered, you may use Adobe Connect or Defense Collaboration Services to attend the webinar.

If you have questions or need assistance, please email the DCoE webinar team.

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This page was last updated on: April 19, 2017.