I don't have specific details on how to create the 'effect' you want but from previous readings, I recall that you must create a separate plane that 'sits' just above the base of the light pole that has a quite specific texture applied to it (again, I have NO details for this), that is subsequently 'enabled' through the "nighlight" tag in the object's config.txt. You should try to find a similar object from the Download Station and determine what to do from that object's content...