So I ordered theses thinking they would be cool for the ceiling but when I opened the box and saw that they were made of styrofoam I thought that maybe I made a mistake.  I did read the reviews and saw that a lot of people were ordering them so maybe I didn't think it through but I don't think that I will be using them for the ceiling.  The need to be glued and if I make a mistake then they will make a mess of my ceiling so I will find another use for them and if so I will update with new pictures.