One key performance characteristic to evaluate when choosing an infrared receiver is its ability to receive data signals and to reject all other sources of noise. If the IR receiver is susceptible to noise, other light sources in the room will be received at the same time as the data and corrupt the signal. This noise might include emissions from incandescent, halogen, neon, and fluorescent lamps, as well as computer displays and sunlight. Other than an effect on range, DC light sources will not corrupt data signals. In contrast, AC signals such as fluorescent lights and flat screen TV emissions are the most common AC noise sources affecting infrared receivers.