Our work on light bulbs wasn't an arbitrary mandate. We didn't just pick a standard out of the air or look for a catchy sounding standard like 25 by 2025 not based in science or feasibility. Instead we worked with both industry and environmental groups to come up with a standard that made sense and was doable.
If you're talking to an architect he can look at a blank piece of paper and once the initial design is there the formula kicks in. Each room should have something unique and different about it - much the same way that in a song every eight bars or so a new piece of information should be introduced.