Hi..thanks for your query.
You can follow the steps below:
1)Use a sunscreen with SPF more than50
2)Take oral vitamin c
supplements and antioxidants
3)Apply a mild Glycolic acid
based or Kojic acid
based skin lightening cream every day.
4) Continue chemical peels
every 15-30 days.These are latest and safest methods of skin lightening when done under the supervision of trained dermatologists.They frequently produce optimum results after 4-6 sittings.
hope this helps.