Took a minute to snap to what you were asking.

You are saying that there are street lights MODELED in your scene and you want to add actual light sources to the modeled lights.

Here's an old thread on using primitives as markschum suggested:
http://www.renderosity.com/messages.ez?ForumID=12356&Form.ShowMessage=975164

Somewhat of a sidetrack, but I keep thinking of uses for this and haven't tried them yet.

To speed up the tweaking if you do use a bunch of actual lights, you might disassemble one of Les Bentley's new OMNI lights with ERC, so you could reposition, but still control all 12 lights from one master.