RGB Parade vs YC Waveform

I am trying to figure out what values the RGB Parade Scope displays and how to put those values to best use.
As I understand it, the YC Waveform scope (with Chroma turned off) displays luminance as an IRE value. That's a calculated value, based on human visual perception, as opposed to luma, which is a numerical value within the video signal. That explains why the YC Vectorscope display for the RGB gradients below shows the highest luminance for the green bar, less for red, and much less for blue (the Saturation and Brightness for all the bars were set to 100/100 with opacity for the bottom of the bar set to zero). Those readings make sense because our eyes perceive green as brighter than red, and significantly brighter than blue.
So, what then is being displayed in the RGB Parade scope? For the same RGB gradients, tt is shows values from 0 to 100. If that is IRE, then it does not match the YC Waveform scope. My guess is that it is the B (Brightness) value in the HSB representation of RGB values of the color channel (which matches the values I used when I created the RGB gradient). It is not the L (Lightness) value in the HSL.
If it is the B value in HSB...then the values shown are not luminance, therefore do not represent what the viewer will perceive. As a result, I think using the RGB Parade as a guide when removing a color cast or balancing luminance among the color channels, is ineffective and perhaps even counter-productive.
With that in mind, what is the best use for the RBG Parade and what is the appropriate way to use it.
Jeff Sengstack

hello,
i just found this link to what looks like a cool program to do what you guys are talking about:
synthetic aperture testgear 2.5
check it out
it has a bunch of scopes
any move advice is appreciated...
may be overkill or just the right touch to a broadcast workflow...
j

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