Which of the following best describes 'glare' in lighting?

Glare in lighting is primarily characterized by brightness that causes visual discomfort. It occurs when there is a significant contrast between bright light sources and the surrounding area, leading to temporary blindness or an overall feeling of discomfort for the viewer. This discomfort can make it difficult to see clearly and may result in decreased visibility or distraction. Understanding glare is crucial for lighting design, as it impacts usability and the overall comfort within a space.

The other choices do not accurately encapsulate the phenomenon of glare. While they may address aspects of lighting, they do not refer specifically to the discomfort experienced when dealing with excessive brightness. For example, the need for more light speaks to insufficient illumination rather than discomfort, while insufficient lighting for tasks pertains to a lack of adequate lighting rather than the presence of annoying brightness. Lastly, the aesthetic appeal of lighting designs focuses on the visual beauty of a lighting setup rather than the discomfort caused by glare.