I am not competing with those cheap plastic, I just wanted to do something by myself. On the market there are several LED macro lights to buy. The only thing what I don't like in most of them, that they have those converter rings screwed on to the filter ring of the objective and that ring slides in to the macro light frame.
Most of the cheap versions are not stable at all. Slipping, turning around and not to mention about the weight and force what that poor, mostly plastic filter thread has to take because of that macro light. Depending of what kind of lens you use it might give unwanted pressure and force to the optical element, which is not good at all especially for zoom lenses with a moving front element.
My version is attached to a particular lenses lens hood, which holds very strong and it is attached to the lens housing not to the optical elements.
So lets see what I had to start with: