Prices always depend on the particular situation. Type of Fixture, where the Fixture is going, where the switch is going, and power source. There are also different labor rates depending on location. There's no real way to generalize something like that. Too many variables.
Mike, I do not know if you have a liscense or how experienced you are but if you are installing this light for someone for a fee be very careful of the liability u are taking on here,be extremely careful if u are not lisc. and give it a lot of thought before doing it.Even the best intenions can get u in more trouble than u can make from doing that work
MAY THE SUN SHINE ON YOUR FACE IN THE MORNING AND YOU AWAKE WITH A SMILE
