What is a foot-candle?
A foot-candle is a measurement of light intensity or illuminance, and it equals 10.76 lumens or one lux per square foot. If you set a candle or light bulb a foot away from a wall and draw…
A foot-candle is a measurement of light intensity or illuminance, and it equals 10.76 lumens or one lux per square foot. If you set a candle or light bulb a foot away from a wall and draw…