ziaiqbal

I install 36 ip camera with 36 port NVR, Day mode is fantastic but some camera night mode is very bad some camera are OK. I cannot find out the problem 01. Some are 2.0 Mega, Some are 1.3 some are 1 mega 02. All camera power near camera. 03. Distance NVR to Came 100 to 1000 meter 04. All camera use Fiber optic cable and then 70 to 80 mtr CAT6 cable please give me solution what to do for 15 camera which is night vision very bad others are ok