What is a footcandle, and how can I calculate it for lighting a room?
A footcandle is unit of illuminance or light falling onto a surface. It stands for the light level on a surface one foot from a standard candle. One footcandle is equal to one lumen per square foot. To calculate the footcandles of a lamp, divide the lamp’s lumens square footage of the room. The lumen rating is usually listed on the lamp package. It’s a lot easier (and probably more precise) to just take a reading with light meter.
