Hello, I’m trying to select some cameras to use indoors in a business. I am looking for a camera with night IR that has a wider, shorter beam rather than a narrow, distance focus. I am already using the Dahua 2MP starlight turret Camera and that seems to have a narrow IR beam designed for distance. Is there a Dahua turret that’s better for use indoors that can cast a wider “short throw” IR that will allow me to see a wider angle without the need to see much past 15-20 ft? Thanks.