I was wondering how to wire two recessed can lights using a 20 amp breaker. I plan to run 12/2 wire(my power) to the first can then connect the second can then run 12/2 wire from the last can down to a single pole switch. Can I do all of this with 12/2 or do I need to use 12/3 between the cans. If I need 12/3 how do I wire this. Thanks.