Red light therapy (RLT) is a non-invasive treatment that uses low-level red wavelengths to stimulate cell regeneration and improve skin health. Widely used for various skin types, it is effective on Indian skin tones too. Here are a few key points to know: Red light therapy (RLT) is a non-invasive treatment that uses low-level red wavelengths to stimulate cell regeneration and improve skin health. Widely used for various skin types, it is effective on Indian skin tones too. Here are a few key points to know: Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle