Fraxel Dual or Cosmelan to treat Melasma in brown skin?

I am an Indian with skin tone is similar Hispanic skin. I am concerned about hyperpigmentation with Fraxel Dual. Would Cosmelan be better? I plan on taking precautions (reduce sun exposure, apply hydroquinone etc) before the procedure. Since 1927 is the frequency used to treat melisma in the Fraxel Dual, can I ask the doctor to set 1550 to a low power setting (or even turn it off) to reduce the chances of hyperpigmentation? Thanks for reading my post A