This is a good question indeed. Using a LED lamp, it takes 30 seconds to dry one hand. The one I own has 4 settings: 10, 30, 60 and 100 seconds. They last for

This is a good question indeed. Using a LED lamp, it takes 30 seconds to dry one hand. The one I own has 4 settings: 10, 30, 60 and 100 seconds. They last for 2 to 3 weeks. I wonder how much damage happens from exposing your fingers for 30 seconds every 2-3 weeks. I'm thinking there could be some risks for technicians who spend their days next to the devices, but devices usually don't leak any light.