hi there please could any one help, i have the swann cctv system dvr8-4600 1080p the systems picture in the day is great but at night moving images like cars seem light just a blur people are also ghost like and unrecognizable , this is my second dvr as i took the other one back to maplins , same thing been onto swanns tech team not much help, any help would be great will add some pictures later thanks