I am going to do some wiring on my house using 12/2 wire and had intended to give each room it's own breaker feeding the outlets AND the lights in the room. I had intended to use a 20a breaker, but I am a bit confused about "the code" and lighting. Is it OK to use 20a on light circuits ( I often see 15a mentioned for lights )? Will it be over-kill to feed 4-6 outlets and 2 light fixtures with 20a breakers?

Thanks for the help.

I think where ever you are buying your supplies, the difference between 25' coils of 12 and 14 gauge wire is chicken feed. Same with the breakers. Over kill, maybe, a bad idea, not really. Some day you have a big job to do and you want to plug in a heavy draw, it will pay.

Consider wiring the rooms so that at least two circuits are in each room, so that if there is a problem with one, or if one needs to be shut off, then there will still be the other circuit still working in that room.

This can be a mix of receptacles and light fixtures.

Unless outlets are for specific appliances or purpose, they are considered as general purpose lighting outlets, same as the light fixture outlets.

There is no problem having lights on a 20 amp circuit. As labman stated, you may need a heavy circuit someday and it will be there for your use.

Thanks to both of you.