... is 10s,20s,30s.5,Induction of automatic open Yes,put hand in lamp,the light open.6,Using ... when it is broken. However, the LED nail UV lamp makes use of LED which is semiconductor luminescent device. ... general, some even go beyond 80°C, once someone touch the tube, they will be scald. However, LED produces ... used. We will not be scalded, even though we touch it. 4. Long life.The ordinary tube-style nail ...