Not only do the best red light therapy wands and LED masks look like Space Age devices, they actually are, with clinically-proven benefits: NASA scientists were the ones to discover the reparative properties of red light. “Red light wands use very low levels of red light to help improve the appearance of your skin,” explains Howard Sobel, a clinical attending cosmetic dermatologic surgeon at Lenox Hill Hospital in New York City. He shares that red light therapy can address many of the most common skincare concerns by fading fine lines, age spots, stretch marks and wrinkles, as well as improving redness, wound healing, and acne.