I am finishing my basement and I'm basically splitting the basement in half to keep half as a storage area. I currently have 4 lights in the basement wired as shown in the first diagram. I want to control the finished and unfinished lights separately. Do I need to pull a new circuit, or can I share the power between the two light circuits as in the second diagram? I don't know if NEC code allows for light circuits to be shared in parallel, but I believe there will be a problem if both sets of lights are turned on at the same time... i.e. voltage drop, path of least resistance.