... Authentication CE.9,Examination form QC.10,Degradation testing time 2hours.11,Product size 29x27x14cm.12, ... Friendly environmental, The ordinary tube-style nail UV lamps make use of UV tube which contains “mercury”. And “ ... environment, especially harm to human body. Lamp of UV tube also troubles to recycle, when it is ... broken. However, the LED nail UV lamp makes use of LED which is semiconductor ...