I was so excited to use the Power Bright series of products, and at very first use I really liked these products. After about a week of using the Power Bright regimen (serum, pure light, and pure night) I went on a long hike and used the Pure Light sunscreen thinking that SPF 50 would be enough for my face. I got the worst sunburn I have ever had in my life! My face is bright red, peeling, and super painful. It has lasted over a week and did not start to clear up until I stopped using Dermalogica products altogether and instead used a regular moisturizer. Perhaps these products make your skin more sensitive to the sun, but if so, Dermalogica needs to alert customers to that. I do not think this product works, and in fact my face is worse off than before I started using it. I am very disappointed.