In contrast, lasers used in ablative surgery typically use 300 watts and burn the tissues they encounter. LLLT lasers transfer small or very small amounts of energy into the skin. Depending on wavelength, tissues absorb energy to produce heat. Low-level laser therapy (LLLT) refers to the use of a red-beam or near-infrared laser with a wave-length between 6 nanometers and power from 5 to 500 milliwatts.
