I actually wanted to be an architect in high school, but I really don't do well with math. So, that was the end of that fantasy. I don't do well with theory and measurements, either. I need to see it and touch it and assemble it the wrong way before I can figure out how to do it the right way. And besides, look at all the cars that get torn up in crash tests before the auto manufacturers finish building them. Research and development is a very important part of the process and I knew that if wanted to get a professional quality out of this build, then I'd have to act like a pro.
I pored over the literature -- graphs and tables describing actual luminosity, beam angles, light spread and lumens at a given distance. Yikes. I got scared. I am trying to adhere to a strict budget for this build, but for a definitive answer on what light would be best for each application, I had to throw down and buy a couple of sample fixtures -- yep, R&D.