Hello, I am really sorry for all the questions, but this is my last one for now.
I have attempted to do some research, but can't find a complete explanation. I am wondering why the production of Mercury Vapor lighting fixtures have been banned. I do know some manufacturers still produce bulbs for support of existing fixtures, but companies (example: General Electric's 201 model hood) are not allowed to manufacture Mercury Vapor light kits.
The electrical company I am under (Ameren Illinois) used to come out when a MV light was burned out, and simply replace the bulb. Now, even though the bulbs are still produced, under limited quantities, they simply replace the fixture with a 100w HPS fixture. Just yesterday, I watched as the journeyman technician removed an entire 175 watt MV assembly, and replace it with a brand new 100 watt HPS assembly (The only problem with the assembly itself was nothing, except it needed a new photoelectric control, as the other one was exhibiting fail mode by staying on all day).
So can anybody answer this. I am aware Mercury is an element that is harmful, but that does not stop the production of flourescent tubes, Metal Halide, and High Pressure Sodium lamps and assemblies, ALL of which still contain minimal amounts of mercury,