Litebook is a portable, patented, unique, medically certified device capable of insurance reimbursement that utilizes THE most effective wavelength of cutting edge LED lights that are rated to last over 100,000 hours which is literally a lifetime. The Litebook Company is the recognized leader in the field of Light Therapy Research and Development: The Litebook's patented technology uses a new kind of light source -- white light emitting diodes (LEDs) -- recently developed in Japan . These tiny lights produce a specific combination of wavelengths identical to the peak wavelengths of the sun -- which turns out to be the wavelengths that our bodies respond to for health and wellbeing -- which makes sense since for millions of years, the sun was the original and only light source.