I have Leupold scopes on my big game rifles and have no problem seeing to shoot during legal shooting hours. Just have turn the magnification down as it gets darker.
What you just described -- having to turn down the power to see -- is one of the things that separates the wheat from the chaff, so to speak. In the worst of lighting, and when the range is beyond stone-throwing distances, you need magnification to make an ethical shot. Set at 3x will for fine for good daylight at most sane ranges, but when the light is all but gone, that same 3x setting at 150+ yards won't allow you to differentiate between fully broadside or quartering or even to make certain you are shooting at the exact deer you want to tag.
Rarely do my scopes get down to as low as 8x -- and most of my shots in moonlight are at least 10x.
