Light Emitting Diode (LED)

LEDs are very small light bulbs which, in contrast to ordinary incandescent bulbs, don’t get especially hot and don’t burn out. These special lights are illuminated only by the movement of electrons in a semiconductor material, and they are very long-lasting. They were originally developed for experimental purposes -- namely to research the effect of light sources in photosynthesis for plant growth.
How does this apply to aesthetic goals? LEDs have been found to trigger natural chemical processes inside the cells, boosting the body’s own production of collagen, which slows in our late teens and, by age 25, nearly slows to a halt. This fact makes LEDs particularly useful for skin rejuvenation, because the treatments can wind back our collagen clocks, so to speak, producing collagen more like we did in our teens and early twenties (at least for a short period of time immediately following each treatment). This allows our natural body processes to repair some of the damage caused by environment, gravity and time.

LEDs produce light in blue, red and yellow wavelengths -- all of which have different aesthetic applications. Together with certain photo-reactive acids, LEDs have been shown to be extremely effective in the treatment of acne.