Powerful enough for professional tyers and rechargeable using a standard USB cable, this is the light without limits. The Infiniti UV light is the most powerful, most environmentally friendly light Loon have ever offered. A note on the power output: historically we have used watts as a unit of measure because of its familiarity with users, and because it was helpful in illustrating the relative strength of our lights. The Infiniti UV light was designed as a 10 W light. During development of the product, a change in components lowered the wattage, but not the actual output of the light. In other words, it became more efficient in the same way that an LED bulb that uses 50 W is far brighter than an incandescent bulb that uses 50 W.