quote:
Wouldn't the number of lights per circuit depend on the load?
Yes. And the cost depends on the type/quality of can light, and the difficulty of installation. Plain open downlight? Adjustable? Low voltage? LED? Ceiling height? Sloped ceiling? Access above ceiling? New home, old home? Gyp board ceilings, plaster ceilings?
I could put in four can lights in one room at home in a few hours - you can stand up in the attic. A different room could take f o r e v e r /sandlot.
OP, your best bet would be getting prices from a couple of electricians and asking them to specifically list what they are doing - especially when it comes to the can light itself.