You do know that one of the reasons they do that is so that you are not able to see obvious warning signs on the "girl's" body. A lot of these women either have some sort of STDs, which would be visible by taking a closer look at their body or they are successful vaginoplasty candidates and hence the lights need to be dim so that one is unable to know who or what they are doing....
Sex change ops are very common in the far east and one would not go through the pain and suffering of doing that to their body unless there is certain gains to be made.
1 month in the business is enough to recover the cost of surgery.