happy sunlight therapy lamp 15000 lux full spectrum led lamp uv-free portable natural health light with adjustable brightness controls(white,a5) amzcool <p> <b>the a5 size lamp area: 6.6x4.1 inch</b><br /> <br /> 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.<br /> <br /> <b>how to use</b><br /> 1,put it on:<br /> place the light on the stand, and put it in a convenient location like on a desk or table top and turn it on.<br /> <br /> 2, adjust it:<br /> find a comfortable distance which sould be facing to you, but you can't looking directly into it.<br /> <br /> 3, start:<br /> adjust the brightness, we suggest using low brightness and about 10 minute at the first time you use.<br /> <br /> <b>usage duration depends on the distance; the closer you are to the light, the less time you should use it.</b> </p><p>if you have any questions in use.you can contact us if you have any questions, thank you!</p>