Effects of Bright Light on Co-occurring Cancer-related Symptoms in Breast Cancer Survivors

Inclusion Criteria:

- Females

- 21 years of age or older 1-3 years post-completion of chemotherapy or/and radiation
therapy for stage I-III breast cancer

- Experience ≥ 2 concurrent symptoms (fatigue, sleep disruption, depressive symptoms,
and/or cognitive dysfunction as measured by 4 screening instruments)

- Be either phase advanced or delayed (morning or evening types by the Horne-Ostberg
Morningness-Eveningness Questionnaire (MEQ) ≥59 or ≤41)

- Sighted

- Mentally competent to consent

- Able to understand English.

Exclusion Criteria:

- Undergoing cancer treatment for another malignancy

- Have metastatic cancer

- Engaged in shift work or travel across more than three time zones within 2 weeks prior
to study

- Current diagnosis of seasonal affective disorder or substance abuse Current diagnosis
of major Axis I psychiatric disorders (e.g. depressive disorders), neurological
impairments, or muscular dystrophies

- Report severe depressive mood (Center for Epidemiological Studies Depression Scale
(CES-D) >24)

- Take prescribed sedative hypnotics or steroids Have eye conditions (glaucoma or
retinal disease), problems triggered by bright light (e.g., migraine), or take
photosensitizing medications (e.g., some porphyrin drugs, antipsychotics,
antiarrhythmic agents)