Thank you all for the nice comments.
It was really difficult for me to do this, and I spent a lot of time on it (much more than a skilled cosplayer I guess). The last 3 weeks, I worked on it from 5 to 10 hours per day. I tried some things, tried other, did and redid things many times during the 4 months I spent working on it (the beginning was not very productive).
Indeed I was so frustrated to see my work not accurate because of an additions of fails. If my boyfriend had not been there, I would have thrown it away before the show and never worn it. I was lucky Tron Legacy wasn't a popular cosplay in the country where I live (in USA, you have so many beautiful cosplays of it !!) so people liked my work even if it wasn't accurate. But I guess it is because you cannot find the supplies needed in my country (I had to order it from USA, UK, China,...).
And we don't have threads about how to do such a costume.
Thank you again, to all of you, because I couldn't have donne it alone.