The NEUTROGENA® Visibly Clear® Light Therapy Targeted Acne Spot Treatment is clinically proven to reduce spots fast. It is an on-the-go 2 minute spot treatment. No mess, residue, or flaking The Science of Acne Light Therapy: Light Therapy is a clinically proven, effective acne technology used by dermatologists for over a decade. The energy from red and blue lights gently filters through skin and has been scientifically proven to target acne-causing bacteria, reducing the appearance of spots. Blue light targets acne causing bacteria while red light penetrates deeper to reduce inflammation. Uses dermatologist in-office acne technology. Chemical free treatment. UV free.