Good question. Migraines have been related to reduced availability of brain serotonin in winter. The same story holds for winter depression. Many people with winter depression experience headache, which resolves with light therapy. However, others experience emergent headache as a side effect of light therapy, which is no fun. Migraines are often exacerbated by bright light exposure (which is one reason migraine sufferers often retreat to darkened bedrooms), and light therapy for migraine has never been tested in clinical trials. Bottom line: you can certainly test light therapy, but we cannot specifically advise it for this purpose.