Skin Color Reduces When Stopped Using Skin Lite. Any Cream That Protects From Sun After Using Skin Lite?

Hi,I am XXXXX(female),22 years.I am using Skin Lite since Novemver,2012 till now.My skin became fair in one month last year.What i have observed is if i stop using that cream my skin colour will reduce and if i go to sunlite also skin color will reduce.Is there any cream that will protect from sun screen after using this skin lite? It did not get side effects to me till now.Can I continue thi cream,if i continue this cream whether it effects in my future?Hw can i maintain my fairness?