Don't concern yourself with watts. You can add up the lamp watts, but you can't determin watts on recepts without knowing what your plugging in.[/quote]
Nor should you worry about it! Even though you are the homeowner you are also the new head electrician on this job!
The fact is, on any given circuit you can plug in 15 hairdryers and force the breaker to trip.
As far as seperating lights and receptacles, that is up to the head electrician (you). If I had extra money I would consider running 15A for my lights and 20A for the recps. That being said, as a real "head electrician" if it was my house i'd run 15A and call it good.