... .Have 5 Photons:Red,Blue,Green,Yellow,Purple and Laser PDT photodynamic led lamp WY-T206Applied range:1.Improve symptoms suchas aging and ... used to promote collagen, mainly for aging and slack skin with fine lines, big skin pores and so on.Blue light ... +/-10nm) is used to sterilize skin, mainly for sensitive skin with acne problems.Yellow light (590nm+/-10nm) is used to stimulate ...