Illuminance, often measured in footcandles, represents the amount of light falling on a surface. It is quantified as the luminous flux density, indicating the intensity of light impacting a specific area. One footcandle is defined as one lumen per square foot. For instance, if a surface area of one square foot receives one lumen of light, the illuminance on that surface is one footcandle.
Accurate determination of illuminance levels is crucial for various applications. Proper lighting enhances visibility, reduces eye strain, and improves overall performance in workplaces and living spaces. Historically, reliance was on estimations; now, light meters provide precise measurements. Understanding illuminance facilitates efficient lighting design, contributing to energy savings and optimized environmental comfort.
