The settings depend on a few of factors: 1) How your skin reacts 2) The handpiece that is used 3) Your skin type 4) The characteristics of the hair. It is best to see a physician with experience and good reviews.
There is no real answer to be given to this question. Your provider is the one who will decide what setting is the best for you based on your skin tone, hair, and pain tolerance. This is why it is so important to go to a reputable and trustworthy practitioner for your LHR needs.