Background: Treatment adherence to home phototherapy is not well characterized.
Purpose: To develop an accurate measure of home phototherapy unit usage.
Methods: We tested a commercially available data logger containing a photo-sensor on two home phototherapy units.
Results: The data logger accurately recorded actual usage and did not record stray light sources over the study period.
Conclusion: A data logger can accurately capture usage patterns for a home phototherapy unit. These devices could potentially be used in clinical trials to measure adherence to home phototherapy treatment regimens.