The Hi-key setting uses exceedingly bright light, which results in upbeat and vivid images. This setting is best utilized in low-light surroundings to reduce the risk of overexposing the final picture. The Hi-Key mode can turn the image completely white when used in bright lighting. The best instances to use the Hi-Key setting are at dawn or dusk, indoors with inadequate lighting, when the subject is in the shade, or at night.