Ft candles vs lux. The square of one foot against the square of one metre measured in feet 328ft is almost ten that is why we have the difference in value between footcandle and lux and the x10 or 10 shorthand. Watts lumens x 0001496. One foot candle equals one lumen of light density per square foot while one lux equals 1 lumen per square meter.
This in turn makes 1 cd equal to 1076 lux reflecting the expected result that light. Measured in lumens per square foot. The foot candle ftc fc to lux lx conversion table and conversion steps are also listed.
1ft x 1ft 1sqft the measuring point for 1 footcandle. Foot candles a measurement of light intensity describes the amount of light reaching a specified surface area. Lumens foot candles x 1076.
While 1 footcandle is the amount of light 1 foot from a 1 cd source 1 lux is the amount of light from the same source at a distance of 1 m. E vlx e vfc 009290304 e vfc 1076391. You can also calculate the number of watts directly from foot candles by combining both equations using the following.
E vfc e vlx 009290304 e vlx 1076391. A foot candle sometimes foot candle. 328ft 1m x 328ft 10764ft the measuring point for 1 lux.
Lux to footcandles calculator lux to footcandles conversion formula. Watts foot candles x 001609696 since 1076 x 0001496 001609696. The foot candle is defined as one lumen per square foot.
To calculate lumens lux from foot candles. Light level or luminance is measured in foot candles or lux. This unit is commonly used in lighting layouts in parts of the world where united states customary units are used mainly the united statesmost of the world uses the corresponding si derived unit lux.
Lumens per watt refers to the energy efficacy not efficiency of lighting. To better understand lighting levels and what these figures mean think of some typical natural lighting situations. The lux is a unit similar to the footcandle but using metric si units.
Foot candles lux foot candles and lux measure the same thingthe amount of visible light that falls on a surface. The illuminance e v in lux lx is equal to the illuminance e v in footcandles fc divided by 009290304. Footcandles to lux calculator lux to footcandles conversion formula.
Full daylight typically equals about 1000 foot. Because 1 m 328 ft 1 m 2 328 2 ft 2. The difference is that the foot candle uses the imperial standard measuring system feet pounds etc while the lux uses the metric system meters grams etc.
Instant free online tool for foot candle to lux conversion or vice versa. Abbreviated fc lmft 2 or sometimes ft c is a non si unit of illuminance or light intensity. How much visible light you get for a given amount of wattage consumption.
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