Green is better for Day AND night a its brighter .
One that looks and operates like this style would be my choice https://www.amazon.com/Feyachi-Tacti.../dp/B01BTJGR16
The adjusters as like scope ones where as my red one in the pic i posted above has 3 tiny screws on the face of it as seen in this pic https://www.dropbox.com/s/svgzt5qjr0...20104.png?dl=0