LED Skin Rejuvenation is the interaction of light, delivered through Light Emitting Diodes (LEDs), to activate cell receptors causing them to produce collagen or multiply.
The light from the LEDs interacts with cells and stimulates them to produce new collagen and elastin. By manipulating the wavelengths, cells can be turned on and off. Yellow light LEDs are used for photo-rejuvenation. Blue light LEDs are used in the treatment of acne. Red light LEDs are used for PhotoDynamic therapy.
So fa, no scientific studies has shown that LED will rejuvenate your skin.