The Light Study

TheLight Study graphic

Join our study to help us learn more about individual light exposure and timing of your sleep 

Fred Hutch is recruiting adults to participate in a study to learn more about individual light exposure and timing of sleep. We hope to use the information that we collect to develop larger studies to understand the health effects of light exposure.

Below you will find the eligibility criteria and survey. If you fill out the survey and are eligible, you will have the option of being contacted by the study staff to see if you would like to enroll in The Light Study.

Why should you participate?

Help us learn about light exposure and sleep timing.

Eligibility Criteria

  • Healthy adult (age 18 years or older)
  • Live in Seattle, WA or Boston, MA metropolitan areas 
  • Own an iPhone
  • Not traveling outside of Seattle, WA (or Boston, MA) metropolitan areas for more than 2 consecutive days during the study period
  • Do not work night shifts

Participant Requirements

  • Complete an online survey (about 10-15 minutes)
  • Use a wearable light sensor for 2 weeks
  • Setup the iPhone app for the light sensor
  • Return the light sensor to us (in a prepaid box) after 2 weeks

Participant Compensation

  • Up to a total of $250 after completing all study activities

Interested? Click here to get started!

Trang VoPham

Principal Investigator


Please contact us for more information or with any questions.