empiretech01.com
empiretech01.com
empiretech01.com
Are you using Infra-Red at night currently? if so the 8MP night in IR looks sharper then the 2231.It does point directly towards a street light.
Keep in mind the streetlight doesn't really help you as the person is then in between the light and the camera and you get a backlit condition.
You probably need to remain with infrared unless you get a camera with white LED and you are willing to use them.