Hydration Elixir: Level up your skincare routine with LightStim PhotoSerum for a boost of hydration that’ll leave your skin feeling smoother, longer. Hydration Your Skin Deserves: Soothing plankton extract helps accelerate the skin’s natural ability to maintain and repair while potent peptides help smooth fine lines and wrinkles. Light and silky, LightStim PhotoSerum provides powerful antioxidant support and long lasting hydration for an appearance that reflects your skin’s inner health.