What are the real facts of laser hair removal on Asian male with skin type 4, specially on full hand?

Hello Doctor i would like to know the facts of what will be the result of laser hair removal on skin type 4 men while reducing the arm's hair and what are the laser machine which has the most effective result and what will be the result while using the E-light IPL hair removal machine. And what can be done if the treatment doesn't work and if you have the reverse effects, like more hair growth and hair that becomes longer than before.