Joe: "It's tough to teach an old dog new tricks (terms)"!!
Light fixtures are luminaires. If I used that term a few years back, some clients would assume that the job was going to be VERY expensive.
The white wire is the neutral. It's also the grounded conductor. What's the difference??? I know, it's in the "bible", I'll change my ways, and try to change my employees. (And remember to use the "correct" term in my CE classes)
In a two wire installation, one wire black and the other wire white, with the black being energized, live or whatever the wire carrying current to the load is called, the white wire is not the neutral conductor. It is called the grounded conductor. If you were to read the instructions for a GFCI, you will see that the instructions do not say to install the neutral conductor to the 'white' screw, but the instructions will say to install the 'white wire' to the white screw. This type of instruction is common to a lot of other equipment we install.
Having two terms with very similar names can lead to confusion. "Grounded conductor", "grounding conductor", "equipment ground" and such can be easily confused in conversations held in noisy enviroments. Like construction sites where wiring is being done. "Neutral" and "ground" are distinctly different words, and should reduce confusion. Other things in the code are done to cut confusion, like color codes (white wire is the neutral). These have no effect on the electrons running down the wires, but the people who work on such benefit from clear terms and labeling.