For home, an indoor dome camera with 1.3 MP/2 MP with focal length of 3.6 mm can be used. This will cover a distance of 20 meters. The camera speed should be 25 fps. A high-resolution camera should be considered where greater detail of scene is required. E.g. Color 460 TVL, Monochrome 570 TVL. Choosing a more sensitive camera will improve reproduction in poorly lit areas. The sensitivity of a camera is indicated by the minimum amount of light in order for the camera to produce a usable picture. e.g. Color 1.0 Lux at F1.2.