Your mood could be influenced by light source, so is your performance on a task or at work. I have written in an article titled; WHAT IS GLARE? How lighting affects Moods and work output/performance(Video Below) on the Steem Blockchain to create awareness on the effect of lighting of your homes and offices/workplaces on your moods and performances/Work outputs, feel free to check it out.
Glare is difficulty seeing in the presence of bright light such as direct or reflected sunlight or artificial light such as car headlamps at night. Glare is caused by a significant ratio of luminance between the task (that which is being looked at) and the glare source....Wiki
A visual impression created by the presence of illuminated area in the field of view. Your performance or mood might be poor because It could cause tiredness, errors, and some injuries to the eye, it always makes affected individuals feel uncomfortable, but might necessarily not cause eye strain.
Glare occur naturally e.g Sun rays, or artificially e.g poor lighting layouts in Building and offices, A computer screen or Television screen, a reflection from a distance metallic objects and headlights from cars which affects drivers. Because of this, some cars include mirrors with automatic anti-glare functions same with some offices. A lot of homes use anti-glare glasses for designs etc. Glare can be grouped into; Discomfort glare and Disability glare.
Discomfort glare results in an instinctive desire to look away from a bright light source or difficulty in seeing a task.
Disability glare impairs the vision of objects without necessarily causing discomfort. An example is when driving towards sunset. Disability glare is often caused by the inter-reflection of light within the eyeball, reducing the contrast between task and glare source to the point where the task cannot be distinguished. When glare is so intense that vision is completely impaired, it is sometimes called dazzle!