... 50HZ 3,Power/12W 4,timer is 10s,20s,30s or 30s,60s,90S 5,factory lamp uv 1,Model/LK-D12W2,Volt ... , the ordinary tube-style nail UV lamps make use of UV tube which contains “mercury”. And “mercury” is not friendly to the environment, especially ... after 5 years (for example): If you are a customer, which one would you to choose?Website: http://www.lightinlight.com http ...