If your natural skin type is fairer and you have got darker due to tanning
then you can follow the following instuctions for getting your natural skin colour.
1.Try to avoid going out in direct sunlight from 11:00am to 3:00pm.Use umberella,large brim hat and full sleeved cotton shirts when possible.
2.Invest in Neutrogena sunscreen with spf 50 and always apply it 1/2 hr before going to sunlight.reapply every 2 hrs for complete benefits.
3.Use Ban a tan cream or Niltan cream at night before going to sleep. Apply the cream on the face at night after washing the face with cold
water and mild facewash.
4.you can also consider getting 3 sittings of glycolic acid
peel from dermatologist
after your skin is primed.
Hope it helps