Dynamic LED light versus static LED light for depressed inpatients: results from a randomized feasibility trial.

Area of Science:

• Psychiatry and Behavioral Science
• Lighting Technology
• Clinical Research

Background:

• Retrospective studies suggest daylight exposure may shorten hospital stays for depressed patients.
• Dynamic LED lighting systems aim to replicate daylight conditions in clinical settings.
• The feasibility of implementing such systems in psychiatric wards requires investigation.

Purpose of the Study:

• To assess the feasibility of a dynamic LED lighting system in a psychiatric inpatient ward.
• To evaluate patient tolerance and comfort with static versus dynamic lighting conditions.
• To inform the design of future large-scale efficacy trials for dynamic lighting in depression.

Main Methods:

• A dynamic and static LED lighting system was installed in four psychiatric inpatient rooms.
• Patients with unipolar or bipolar depression were randomized to either dynamic or static lighting for 4 weeks.
• Primary outcome: patient discontinuation due to lighting discomfort; Secondary outcomes: recruitment, dropout, visual comfort, depressive symptoms, and suicidal ideation.

Main Results:

• No patients discontinued due to lighting discomfort; the system was 100% functional.
• Dropout rates were higher in the dynamic group (56.3%) compared to the static group (33.3%), mainly due to early discharge.
• Patient satisfaction was high in both groups (78.1% dynamic, 71.8% static), though some reported low evening light intensity.

Conclusions:

• The dynamic LED lighting system is feasible and well-tolerated in a psychiatric inpatient setting.
• High dropout rates were attributed to early discharge, necessitating adjustments for future trials.
• Future studies will utilize a shorter duration, focus on endpoint assessments, and optimize light intensity and color temperature based on time of day.