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conclusions?
It seems to me that the overwhelming practical message in this is that colour of the light doesn't really matter, a dim red light or a dimmer green or white light that creates the equivalent response in our eye to the brighter red one will achieve pretty much the same result. I suspect that to some extent, the debate is being somewhat prompted by the fact that most off the shelf green or white lights are designed to be bright rather than dim, and off the shelf red lights just happen to appear duller. So intensity is the key, as many have said.
The proviso, as someone has also said, is that the actual colour of an object on the chart can also affect the result dramatically by selectively affecting its reflectivity to a coloured light source (red objects are hard to see under red light etc).
Another issue that might have a significant impact (which does not appear to be addressed) is if the eye is responding differentially to different colours in ways that we do not directly perceive e.g. even though the dark adapted eye is less sensitive to red light (on which both articles are agreed), the objective intensity of a brighter red light is actually causing our dark adaption rate to be slowed down relative to the duller green one, or some such effect.
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