It’s not about heat; blue at about 415 nm excites porphyrins in C. acnes, creating reactive oxygen that disrupts the bacteria — so I keep sessions gentle, around 10 minutes on low, and adjust if a client’s barrier feels delicate. Do you also see less post-treatment redness with blue compared to red when personalizing for sensitive skin?
I definitely see less post-treatment redness with blue light compared to red, especially when I keep sessions around 10 minutes like you. I think it’s the lower energy output that helps. Have you noticed that clients with darker skin types respond better to blue treatments?
I agree that blue light shows less post-treatment redness, and I’ve found that using a light gel during sessions can help soothe the skin even more. It could be worth trying with darker skin types, given the extra hydration can enhance the results — have you seen any unique reactions with specific products?