I was thinking there would be some solution for places where you can not modify ceilings, such as when renting. I'm not a renter, but the biggest electrical upgrade I've done is adding a single light in an unfinished room. There is one switched light in the hallway next to this room, but the rafters run against the direction I would need to wire, and there is an AC duct in the way too. I don't see how I could fish the wiring without cutting big holes to work around the rafters/duct. How much should I expect to pay a professional for such a job; say three recessed lights on each side?