Neutrogena Light Therapy Acne Spot Treatment harnesses the light therapy technology used in the dermatologist office to target and treat breakouts quickly. Clinically proven to speed the reduction of breakouts, this acne spot treatment uses red and blue light to treat acne without flaking or burning your skin. Its patent-pending design allows light to surround the pimple for effective, targeted treatment: blue light penetrates just beneath the surface to target acne causing bacteria, while red light goes deeper into the skin to reduce inflammation. The easy-to-use, portable design is ideal for on-the-go acne treatment, and leaves behind no mess or residue.