Well I didn't necessarily mean it with such ominous undertones, but yeah any visible light out the front?
Awhile back I had my illuminated crosshairs on a lynx and the thing turned and walked right up on me and we stared at each other for a few moments. Never could figure out how he knew I was there, cuz it was dark, I was downwind and concealed under a fallen spruce, not moving. Up here in winter the snow-covered ground combined with the northern lights makes it an eery dusk-like light with deep shadows. It was such a bizarre encounter that I just watched, ended up letting him walk since he got the better of me. It took me a while to figure out what gave me away. Only came over me much later when I had left the illumination on back at camp and saw it out the front of the scope - didn't even know what it was at first. Then it hit me, only thing made sense was the illumination gave me away. Boy did I feel stupid. It never occurred to me that illumination went out the objective as well as the ocular, lol.
So it just got me interested in looking at that aspect of scope design. Of scopes designed for hunting or military applications it is striking how many of them give light out the objective.
That's only reason I'm asking. I'm interested in the LRR-MIL on the 3-27x56 PMII for a do-it-all scope, to include hunting.