Here's my rates and comments.
The first one wouldn't work too well because it's just one shade. It would be hard to see it in yellow or bright areas.
Rate: 4/10.
The second one looks higly obstructive meaning you could barely your target, and wouldn't work too well in dark areas at all.
Rate: 1/10.
The third one looks quite alright. Has multiple shades and isn't obstructive at all.
Rate: 9/10.
The fourth one is a bit obstructive, but not as much as the second one, and wouldn't work in the dark too well.
Rate: 3/10.