Here is what I did on my 6k/e:
I used RGB LED stripes and put them between the bulp holder and meter.
The (still) analog RGB Dimmer sits above the patchbay to play around with.
Check the pictures.
Very cheap, very bright if needed, light color is totaly adjustable, some work, yes,
but in the end you can mix your color and impress your studio cats, dogs and clients. (and yourself of course, hehe)
now i would like to have installed digital RGB stripes, which came out after I put them in:
you could then color code VU sections as needed!
(and also make a hell of a lightshow!)
robbie