The laser for toenail fungus might burn, but LED light doesn't burn. It's like sunlight except with benefit of no harmful UV rays. The article states you will not kill bacteria/fungus by spending a few days in the sun. You have to do it every day...like Daniel is doing.
Other (including myself) have had success with anti-fungal treatments. Just today someone posted that his lips are healing from nystatin cream. But if you do not want to apply anything to your lips, the LED light is a stronger alternative.