happy sunlight therapy lamp 10000 lux full spectrum led lamp uv-free portable natural health light with stepless dimming(white,a5) amzcool the happy energy sunlight therapy box brings you the simulated natural sun light in door, no-flicker, uv-free and full spectrum. provide a natural sunlight 10,000 lux on a snowy day, rainy day, cloudy day, and other moment lack of sunlight!<br/> <br/> mordern designed, blends seamlessly into your home or office, easy to carry and use.leading to better rest and working.<br/> <br/> <b>how to use</b><br/> 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.<br/> <br/> 2, adjust it - find a comfortable distance which sould be facing to you, but you can't looking directly into it.<br/> <br/> 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.<br/> <br/> if you have any questions during use,please feel free to contact us.