Light Therapy to Treat Depression in Pediatric Stem Cell Therapy Recipients

The participants are being asked to be in this clinical trial, a type of research study, because the participants are going to have a hematopoietic stem cell transplant (HSCT) in the near future. Participants that get HSCT's often get depression and/or suffer from depressive symptoms, tiredness, and sleep disturbances. Primary Objective To evaluate the efficacy of BL therapy for the treatment of depression in children and adolescents undergoing hematopoietic stem cell transplant. Secondary Objectives * To evaluate the temporal effect and magnitude of BL vs. DL therapy on depression in pediatric patients undergoing HSCT. * To evaluate the efficacy of BL therapy for the treatment of fatigue in children and adolescents undergoing hematopoietic stem cell transplant. * To evaluate the response of BL therapy versus DL on sleep quality. Exploratory Objectives * To compare incidence of positive delirium screenings between those receiving BL therapy versus DL * To evaluate participant and caregiver perceptions of the acceptability, ease of use, and risks/benefits of the use of Light Therapy Glasses during HSCT utilizing qualitative interviews.

Inclusion Criteria: * Age ≥8 to \