Thanks Charlie. The dimmer is not going to control non dimmable led lamps. Only those that are specified as this.

But unfortunately even this has not really consistent results.

I have disassembled a Legrand dimmer that is trailing edge one. Inside is a factory in the size of a really small form! Three pcbs and two power transistor with a bridge among others. Amazing what they put inside this little box.

Have not found more details or a working circuit on this kind of application.

Ioannis