How does Clarity's blemish coverage last, and how do I maintain it?

I am writing to inquire about the duration of the Clarity blemish treatment. I am considering the Clarity blemish treatment due to faint pigmentation around the sides of my nose and cheeks, as well as my overall dull skin tone. I would like to know how long the results last after a certain number of sessions.

Since pigmentation seems to be heavily affected by UV rays and lifestyle habits, I felt that getting the procedure done alone wouldn't be enough.

Even after my skin tone has been evened out to some extent with Clarity Blemishes, can the blemishes become darker again over time?

In that case, I am also wondering if regular sun protection or whitening product care is important to extend the duration of Clarity's blemish reduction. Is it possible to receive treatments at regular intervals initially, and then perform maintenance treatments every few months thereafter?

Rather than undergoing treatments too frequently, I would like to manage my skin without overexerting myself while monitoring its condition. I would like to know the general maintenance method and appropriate intervals for Clarity Blemish Treatment.