The A5 Size Light Area: 6.6x4.1 (inch) The light therapy lamp bring you daylight indoor by 15,000 Lux bright light, no-flicker and UV-free. Provide a natural sunlight on a snowy day, rainy day, cloudy day, and other moment lack of sunlight. Tablet designed with wood stand, blends seamlessly into your home or office, easy to carry and use. How to Use 1,Put it on: Place the light on the stand, and put it in a convenient location like on a desk or table top and turn it on. 2, Adjust it: Find a comfortable distance which sould be facing to you, but you can't looking directly into it. 3, Start: Adjust the brightness, We suggest using low brightness and about 10 minute at the first time you use. Usage duration depends on the distance; the closer you are to the light, the less time you should use it. If you have any questions in use, please feel free to contact us.