At Kivo, we include yellow light at the 590nm wavelength in our devices because of its gentle yet powerful ability to support skin health, reduce redness, and calm inflammation. This wavelength penetrates deeper than blue light but remains within the upper dermis, where it helps stimulate lymphatic flow, boost circulation, and promote cellular renewal—without triggering irritation. It’s especially beneficial for sensitive, rosacea-prone, or post-treatment skin, and has shown promise in improving conditions like melasma and skin dullness by regulating pigmentation and encouraging a brighter, more even tone. Yellow light is also known to support wound healing and calm reactive skin, making it a go-to for anyone looking to reduce redness, soothe the skin barrier, and restore a healthy glow—naturally and painlessly.