I am unsure of how to go about my lighting design for my new addition? I know that commercial buildings have strict codes as far as how many watts per square foot of lighting a building can have. From what I understand the load for a service is calculated and three watts of light per square foot for residential. This is the number used to calculate service. Am I allowed to exceed this amount of light? As three watts per square foot would leave me in the dark. I would much rather have more light than needed and dim it to the situation or mood. Do the watts allowed per square foot apply to residential?