Retro-fitting CMH lamps into MH ballasts

[TheFertilizer]

Been reading around and I can't really find a straight answer on this. Now assuming for equal wattage, what's stopping a person from buying one of the socket conversions ( or finding a CMH bulb with an E39 ) and then running it in their usual digital MH ballast? I've heard that most of the CMH ballasts are just hyped-up magnetic ballasts anyway, and so wondering if it needs to be magnetic?

I know that an operating frequency of 50-60 Hz is best and that it's supposed to be a "square wave" ( no idea what that means ) but I can see that my Apollo digital ballast is specified to run at 50-60 hz so couldn't I get one of these 400 W CMH bulbs and run it off this?

ConstantColor CMH Chroma-Fit™ Ceramic Metal Halide Lamp, 400 watt, ED18, Medium Screw (E39) Base - Incandescent Bulbs - Light Fixture

 

[Grassmaster]

A special ballast is needed for ceramic metal halides. Not just any digital ballast will do. CMH lamps require a low frequency, which makes high-frequency digital ballasts incompatible.

Finally, CMH ballasts use square-wave technology.

Your Guide to Ceramic Metal Halide Grow Lights