A few general comments:
Years ago I developed a night-time brightness test with a black-and-white chart illuminated with a 100-watt bulb at 25 yards. With scopes set on 6x to even out the effect of magnification, all modern scopes test between 6 and 8 on the chart. So far all the 8's have been scopes costing over $1000 with wire reticles.
If the reticle is mounted on glass (whether because it's illuminated or etched), very few scopes have tested over 7. These require a heavy reticle to make up for the slight reduction in brightness.
John-
Of the scopes you have tested that were 7 or 8 what ones had wire reticles? I see you say all but what brands?
Thanks
Rob