Daysimeter User Group: Gathering and Sharing Data for Circadian Research

The Lighting Research Center has formed a collaborative group of researchers from around the world to collect data in different lighting applications using a special light measuring device known as the Daysimeter. This site is exclusively for the members of this collaborative Daysimeter User Group.

Analyses of Recent Data

Bob White went skiing, and the Daysimeter went with him. You can see in the three graphs below, the Daysimeter recorded a high level of activity, bright light exposure and freezing temperatures!

High activity ...


Bright light exposure ...


Cold temperatures ...