Asian, medium brown complexion, super dark knees, looking for solutions.

My knees are around 80% darker than my actual complexion on my legs, thus more noticeable, and it looks like a big dark patch rather than a more natural slightly dark knees that I usually see in people of ethnicity. I tried IPL laser, skin peels, hydroquinone creams and it seems to have only made it worse(darker). I'm looking for a skin lightening treatment that is effective and is scar/pigmentation free and that works relatively faster? Any suggestions? safe lasers,creams?