IBD affects over 1.5 million individuals in the US with an estimated direct cost of $6.1 billion. Recently, there has been an increased understanding of the importance of sleep and sleep disruption in IBD as a potential modifiable risk factor. The hypothesis is that intervening with morning bright light therapy (BLT) in IBD patients with CM will decrease intestinal permeability and pro-inflammatory cytokines, positively impact intestinal microbiota, and improve quality of life (QoL). A Re-Timer device will be used to administer BLT efficiently and safely to test this hypothesis. Prior to treatment subjects will be screened for subclinical inflammation using a validated questionnaire and fecal calprotectin level. They will also complete questionnaires about their dietary habits, fatigue, sleep habits, quality of life, and severity of their underlying disease. The subjects will be randomized and given BLT or the placebo non -BLT device for 4 weeks. The proposed studies will assess whether BLT has an impact on IBD patients' inflammation, intestinal permeability, and intestinal microbiota.