My tech told me that you need less fluence when you are getting treated with a larger spot size. She said the larger the spot size, less energy is scattered and so it penetrates deeper, so that’s why you need less energy. I was just wondering if that is really true? Also, I am going to have my first treatment with GentleLase (I already had many treatments with Lightsheer and Harmony), but I’m a bit worried because I only read bad reviews about GentleLase, mostly people saying that it actually stimulated hair growth… is there anyone who had good results with it? One more question, regarding the spot size… I know the GentleLase has various spot sizes, like 18mm 15mm 12mm 10mm, so my question is: getting a treatment with the 18mm spot size at 18 Joules is better than being treated with the 10mm spot size at 25 Joules???