Limited by size, the camera is low power consumption design. So in order to make camera works long time with battery in night and prevent the camera to be overheated, the infrared lights will work on low power mode. So the night vision only can cover 2 meters / 7 feet range. The image will be poor quality if the camera is placed in complete dark environment. So if the night vision is necessary for you, you can leave a light around the camera or place an external infrared illiminator. Besides, you can adjust app->Device Settings->IR-LED Config->Set to Bright 99. This way may improve the image quality a little.