I know from reading your posts in various forums that you know what you're talking about Andrew, but I don't get the logic of adjusting a viewing light source to match a print unless the light source happens to be similar (in intensity and colour) to the light source under which the image will eventually be viewed.
OK, let me explain. What we hope to accomplish is a screen to print match naturally. That means we need some viewing booth or system near the display such that we can view the image on the display and the print. I can suggest a number of products and solutions, and I'd suggest the print booth (if we can use this term) be 90 degrees from display and such that light isn't affecting the display itself.
We want the luminance of the display and booth to be such that we achieve a visual match. That means altering one or the other (or both).
With a display, ideally we would drive it as low as possible since that results in it laster longer. Fortunately (or unfortunately in this discussion), LCD's can pump out a great deal of luminance. Fortunately so can whatever we use to view our prints.
I use both a continuous tone Solux lighting system (its spectrum is ideal) and a GTI Fluorescent box. The later has a dimmer to control the intensity of the booth which is great, and doing so doesn't affect the color. Can't do that on the Solux, I have to physically move the distance since I can't dim them (or the color changes). I use the Solux for larger print work, the Fluorescent box sits near the display and I can alter either or both the both and the display to result in a visual match.
You have a problem with print to display matching whereby the display is too bright compared to the print and you can't turn the display down any more. So can you raise the intensity of the viewing conditions?
OK, you move from your editing area to anywhere else. Yes, whatever illuminant you view the prints under may be vastly different from the booth, but then the display isn't in the picture here so its not a huge issue. Well it is an issue when you make a nice print that matches your display and viewing booth, then a client views them in their living room, under totally different lighting that's reflecting off their pink walls. That's a different issue we can look at (actually, there really is no prefect solution). But getting back to print-screen matching, can you alter the viewing conditions of the print?