How can I instance lights to multiple points?

You can instance lights like any other object. just use a pointSOP and set the instance attribute to the light. On th object level You have to add the point instance render parameter and set it to true

for more control You may read this

http://www.sidefx.com/index.php?option=com_content&task=view&id=1050&Itemid=216 [sidefx.com]