Sleep disorders can have many causes and may be of many types; Insomnia is a familiar amongst the many types of sleeping disorders. Medication often proves to have worst side effects and the body builds a resistance or a dependency to the commonly used sleep drugs as well. Whether the causes to these sleep problems are deeply psychological or related to more common reasons such as seasonal affective disorder, light therapy, especially blue light and dawn simulation, have been highly effective in providing relief to patients and helping them sleep when they need and want to. » Read more: Light therapy for sleep disorders