... 10s,20s,30s or 30s,60s,90S 5,factory lamp uv 1,Model/LK-D12W2,Volt/AC100-130V 60HZ AC200 ... , when it is broken. However, the LED nail UV lamp makes use of LED which is semiconductor luminescent device. ... very low. For instance, a 2.5W LED nail UV lamp only costs 0.0025 kilowatt/hour. 3. Safety, do ... dry time is almost 2-3 minutes.LED nail UV lamp save working hours greatly for customers. 7. Low cost ...