I have some scopes with illuminated reticles but haven't used that feature yet in daytime hunting. It makes sense to better see the aiming point on a cape buffalo. I did use it last year when I had the great fortune to shoot a leopard with Mokore in Zimbabwe at night. I had the illumination turned down low, or so I thought, but when the PH turned the red light on, I couldn't see the cat in the tree. My PH could with his naked eye. The leopard had proved to be skittish and look for a reason to leave the tree before. My PH, Doug Duckworth, was wondering why I hadn't shot yet while I was expecting him to turn the light up, which he already had done. I didn't consider how the small red dot, while not bright, was still enough to kill what natural night vision I had. Doug turned it up some more after we had to chance some whispered communication and it worked out but it was a lesson learned (relearned from past military days). Sorry to stray from the OP's subject some.