Post #1219: 
thanks for the response
I tried this code and works, but, when using a slack of theses lines in a same button, start to come some problems. Is like it doesn’t like to have to much code at same button. Not sure if that have sense…
BTW the way I’m tryng to add the buttons for the color and strenght of a lamp object but doesn’t work. I’m trying with this line in property slot:
C.object.data.elements.active.nodes[“Emission”].inputs[0].default_value
C.object.data.elements.active.nodes[“Emission”].inputs[1].default_value
Can you say what is wrong? thanks a lot Master