An Illuminance Meter is a device used to measure the amount of light that falls on a surface. It quantifies light intensity in units called lux or foot-candles, helping users assess lighting conditions in various environments. This tool is essential for ensuring adequate lighting in spaces like offices, studios, and outdoor areas. These meters are commonly used by professionals in fields such as photography, architecture, and agriculture. By providing accurate measurements, an illuminance meter helps optimize lighting for tasks, improve energy efficiency, and enhance overall visual comfort in different settings.