What is the definition of a foot candle in relation to illumination?

A foot candle is defined as the illumination produced by a single candle at a distance of one foot away from the light source, specifically within a one-foot radius sphere. This measurement describes the amount of light reaching a surface from a standard candle situated at the center, which provides a clear and consistent reference for evaluating light levels and can be essential in settings such as food safety, where adequate lighting is necessary for safe operation and food handling practices.

Understanding foot candles helps ensure that work environments are properly lit, which is crucial for maintaining high standards of visibility and safety in food preparation areas.