Blue light kills acne bacteria — it's the go‑to for dermatologists. Red light penetrates deeper, stimulating collagen and reducing inflammation. The light therapy market research shows that blue light holds the largest share, but red light is the fastest‑growing. Why the shift? Because red light has broader applications: anti‑aging, pain relief, and even hair growth.

What's the science? Blue light (415nm) targets the sebaceous glands and kills P. acnes bacteria. Red light (630‑660nm) boosts mitochondrial function, increasing energy production in cells. The light therapy market trends highlight that the fastest‑growing application is acne vulgaris, driven by social media and the desire for clear skin.

But home devices are weaker than clinic ones. A handheld LED mask may help mild acne, but severe cases need professional treatment.

The bottom line: for acne, start with blue light. For wrinkles or pain, try red light. And always wear eye protection — bright light can damage your retina.