... friendly to the 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 luminescent device. It ... low. For instance, a 2.5W LED nail UV lamp only costs 0.0025 kilowatt/hour.3. Safety,do ... is almost 2-3 minutes.LED nail UV lamp save working hours greatly for customers.7.Low cost.