Set parameter "Initial Intensity" for every family type

i work with Revit 2018.3 and Dynamo 1.3.4.

I try to set a value for “Initial Intensity” for every typ in the family.
The light geomtry family is a nested family in the test file “test_3types.rfa”.

After passing through, no error is displayed. But the node “Parameter.ParameterType” says that the type is “invalid”.

But the values were not changed:

When i try to get the values, after i run the graph, everything seems right:

I think, it has something to do with the “button type” of “Initial Intensity”

Any idea whats wrong?
Forum_set_Initial_Intensity_of_family_type.dyn (11.0 KB)
test_3types.rfa (992 KB)

Is the problem too difficult or too easy? Does not anyone have an idea why it could be?

It took me a while to find the way to do it, but actually you just need to find the nested family types (either using Family Types dropdown node, or using code blocks - it depends how many you have and how are their names):

Thx you for your help.
The mistake was that I chose the wrong parameter name.
I need Luminous Flux…and had initial Intensity…