Each type of light used in light therapy has its own characteristics, reaching certain layers of your skin and provoking specific reactions. Blue light waves Wavelength 415 (+/- 10) nm Penetration depth up to 12 mm These waves affect upper skin layers, having the least deep penetration. This mode is especially effective for acne. It fights propionic acne bacteria and is an effective alternative for people not responding to other treatments or antibiotic therapies. Especially good for dark and teenage skin.  Antibacterial action: Prevents future outbreaks of skin rashes; Anti-inflammatory effect; Soothing properties.  Yellow light waves Wavelength 590 (+/-10) nm Penetration depth up to 1 cm Deeper penetration into skin layers. The yellow light mode is necessary to care for combination, oily, sensitive and large-pore skin. This mode is most effective in fighting oxygen starvation of tissues and preventing lymphatic stagnation. Its basic features are as follows: Lymphatic drainage effect; Skin oxygenation improvement; Increased blood circulation; Anti-stress effect; Elimination of swelling and improvement of complexion; Antifungal, antiseptic effect; Elimination of dark circles under your eyes. Red light waves  Wavelength 620 (+/- 10) nm Penetration depth up to 3 cm deep into your skin Red light waves are the most powerful in terms of penetration into your skin. The peculiarity of red light waves is their ability to retain moisture in deeper skin layers by increasing the natural hydration level. The skin becomes healthy, smooth and radiant. Optimal for mature skin in need of stimulation. Basic advantages:  Soothing; Activation of collagen production; Growth of new vessels; Pores contraction; Increasing the skin’s natural moisture level.  Combination mode Combination mode (red, blue, yellow light) is designed for normal skin. Flashing mode Flashing mode promotes the deepest penetration of cosmetics into your skin.