The primary goal of this study is to determine if a circadian based intervention can help lower the health risks associated with habitual short sleep duration. Laboratory studies indicate short sleep duration can lead to circadian misalignment by altering the daily timing of light exposure, in turn, this misalignment can increase risk of cardiometabolic disease. This work will have important implications for developing treatments and countermeasures for people who are not able to get enough sleep (e.g., shift-workers, older adults, people with sleep disorders) with the goal of reducing their risk of diabetes and heart disease.