rhinoscriptsyntax AddSpotLight error

Hello Everyone,

I am trying to create a spotlight using python and rhinoscriptsyntax. The first two inputs are as point3d item acces, and the slider is a float item access. I get the following error

1. Solution exception:'GrasshopperDocument' object has no attribute 'Lights'

and in the compiler:

Runtime error (MissingMemberException): 'GrasshopperDocument' object has no attribute 'Lights'
Traceback:
line 138, in AddSpotLight, "C:\Users\Gabriella\AppData\Roaming\McNeel\Rhinoceros\5.0\Plug-ins\IronPython (814d908a-e25c-493d-97e9-ee3861957f49)\settings\lib\rhinoscript\light.py"
line 3, in script

any help is appreciated :)

Gabriella