Is it okay to add a Retinol or Light Therapy Mask (w/blue and red light) or both to the Regimen. It may be helpful to know that my skin is generally (though not necessarily perfectly) clear with applying the BP once every other day (I wash and moisturize with your products every day). Also, I'm asking about those potential additions not only b/c of their potential benefits for acne but (mostly) b/c of their potential benefits for dealing with hyperpigmentation (not caused by acne). If it is okay to add them, are there any tips you would give for adding them well? Thanks for your help.