The Sunetics Clinical Laser uses 100% Laser energy. The Hood on the Sunetics Unit contains an array of laser diodes. Each laser outputs red laser light at a 650nm wavelength.
There is a huge difference between lasers and LEDs, as they both have different uses.
LED: LED stands for Light Emitting Diode and are typically what you see inside of flashlights and similar products and come in many different colors (eg: Christmas Tree Lights). LEDs are divergent and incoherent. Divergence means that the light spreads out all around the diode and loses power the farther away it gets from the light source. Incoherent means that the waves of light move at random, causing the light to lose energy as it travels. LEDs are typically used as light sources and are sometimes used in medical devices to treat surface skin conditions. Because the energy is diffused, LED light does not penetrate deep into the skin, therefore, it is effectively used more for treating surface skin conditions, such as acne or wrinkles.
LASER: LASER stands for Light Amplification by Stimulation of Emitted Radiation (typically written as Laser). Lasers are monochromatic and coherent. Monochromatic means that all of the light produced by the laser diode is the same light wavelength, which is very important for medical procedures that only see effects from a specific wavelength. Coherent means that all of the waves of light are moving in phase together, rather than randomly. Being coherent allows the light to be much more concentrated and retain all of its energy. Because it is concentrated, lasers point all of its energy in a single direction and does not diffuse. This concentrated light is able to penetrate deep into the skin to reach the hair follicle 4 mm beneath the skin.