Collagen Infrared Light Therapy Pads

Different light wavelengths penetrate different depths into the skin as well. LEDs between 650nm & 950nm penetrate the deepest into tissue ( .6 in to 1 inch) and can be identified by their dark red color (Healthy Wave Mats use 660nm LEDs). Low level laser light therapy will only affect as deep as the light penetrates into the tissue.
While different colored LEDs can have different effects on cells each with their own benefits all light spectrums not between 650nm & 950nm penetrate the tissue considerably less. The relative depths different light spectrums would penetrate the skin are as follows:
650-950nm (Dark Red) – 1 inch
600-650nm (Red) – 0.6 inches
570-600nm (Yellow to Orange) – 0.3 inches
495-570nm (Blue to Green) – 0.16 inches
380-495nm (Violet to Deep Blue ) – 0.12 inches