I am in market for 12-16 4K-2K Cameras with 16 Channel NVR for newly acquired bar/restaurant in Philly downtown . I read a lot here about Dahua cameras but not sure if it will fit within my budget. I also plan to hire professional to install rather than taking up big task myself. I am considering Lorex 9 Camera 4K System with 16 Channel NVR being sold at Costco (Costco Wholesale). Not sure if it will be able to capture good resolution video in low light setting. Being bar ambiance - it will be normally low light situation all the time. I also want to make sure camera will be able to zoom in without loosing quality of video(just in case). Looking forward to hear your views. I must admit Mat200 brought me here from Slickdeals forum.