Blue light therapy is the type of light therapy most commonly used to address acne breakouts. The wavelength of blue light has an antimicrobial effect, making it effective at killing several types of bacteria that can collect in your pores and oil glands and cause breakouts. In addition to that, visible red LED light (wavelength range of 400 – 700 nanometers) therapy is a gentle and effective way of healing and rejuvenating your skin, also known as photomodulation.
Studies have shown that concentrated red light (no UV light is involved here) is absorbed by cell mitochondria and stimulates production of collagen – the building block of your skin structure.
The heat and light boost blood circulation, bringing more blood and nutrients to your skin. So it is still up to you what you gonna choose between the two, it’ll both help you.