One session can be done for light chemical peel? Will it be effective?

Hi, Thanks for your query. Chemical peels are definitely a good option to lighten your skin tone and also to control mild to moderate acne. But the strength and the combination of peels will be decided by your doctor. I would recommend a salicylic acid based peel initially to control acne and then proceed on with peels which will improve your skin tone and texture. My best wishes to you.