Domoticz

Hi all,
totall rookie to all this but doing my best to learn and need some advice on how to go forward.
Am trying to connect my Lifx bulbs to a dummy switch (which will later on be switched to a KAKU switch). So far I managed to piece together a short python script to turn on and off my bulbs. However I have no clue how to run the script from domoticz. I tried creating a dummy (x10?) and added the script as
script://home/pi/testing/on.py

I get no error message in the log but als nothing happens. When running the script from putty it does work.
Any ideas where I am going wrong? Probably missed something obvious...

Thanks!

some more info...

python script has been made executable and looks like follow...

#!/usr/bin/env python

from lifxlan import Light
light = Light("mac","ip")
light.set_power("on")

Really don't get where I'm going wrong as script works outside domoticz