Internet speed can affect lag, so motion is often worse on live video feeds, while recordings have fewer problems security-company-san-diego.html">than live streams. Nighttime videos use infrared light instead of visible light, so they don't match the color or detail of daytime videos. Therefore, we assessed the brightness of the nighttime picture instead, with brighter video producing more detail. The top nighttime security camera was the Belkin NetCam HD+, which illuminated our room better than other cameras. AudioOur audio tests took a simple approach:we listened for loud, understandable audio. Some cameras were loud but the audio was distorted, while others cameras lacked distortion but were too quiet, making it harder to hear activity.