1. Fast curing effect, drying in seconds and saving electricity! save costs! 2. Built-in temperature protection sensor, long life, up to more than 20,000-35,000 hours; 3. Stable performance, high energy, uniform irradiation, and light decay of only about 5% within 15,000 hours; 4. UVLED does not contain mercury, does https://www.sulodakuvlamp.com/water-cooled-uvled-lamp/