We felt like we had a reserved spot at Lowes when we went through the building process. And boy oh boy the decisions sure get to you after a while. Try to stay ahead of them if at all possible. Take you time picking out lighting for each room. We were rushed and it cost us in the long run cause we ended up replacing half of what we got to start with.
It will get very stressful at some points. Take a deep breath and move on. It is so worth it in the end. After all ...it's only money. LOL
Best of luck to you through the building process. Share pics as you can (Please).