Brooke Martin
Lux and foot candles are both units used to measure illuminance, specifically the amount of light received per unit area. Lux is the metric unit of measurement used in the International System of Units (SI) and is used in Europe and other parts of the world. Foot candles, on the other hand, are the imperial unit of measurement and are widely used in the United States and other countries that follow the imperial system. Since they represent the same concept of light intensity, they can be converted from one unit to the other. To convert lux to foot candles, we divide the lux value by the conversion factor of approximately 10.764. This allows us to determine the appropriate level of illumination for various applications and make informed decisions about lighting conditions.
| Characteristics | Values |
|---|---|
| Lux unit of measurement | Metric unit of measurement used in the International System of Units (SI) |
| Foot Candle unit of measurement | Imperial unit of measurement |
| Lux usage | Used in Europe and other parts of the world |
| Foot Candle usage | Used in the United States and other countries that follow the imperial system |
| Lux definition | Measures the amount of light that falls on a surface in lumens per square meter (lm/m²) |
| Foot Candle definition | Expresses the amount of light in one square foot |
| Lux and Foot Candle conversion factor | 10.764 |
| Lux to Foot Candle conversion | Divide the lux value by the conversion factor |
| Foot Candle to Lux conversion | Multiply the foot candle value by the conversion factor |
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What You'll Learn
- Lux and foot candles are units of measurement for light intensity
- Lux is the metric unit of measurement in the International System of Units (SI)
- Foot candles are the imperial unit of measurement
- Conversion factor is 10.764, divide lux by this to get foot candles
- Foot candles are used in the US, lux is used in Europe and elsewhere
Lux and foot candles are units of measurement for light intensity
Foot candles, on the other hand, are imperial units of measurement, widely used in the United States and other countries that follow the imperial system. One foot candle equals one lumen per square foot. To put it simply, foot-candles express the amount of light falling on a square foot, while lux measures the amount of light on a square meter.
The distinction between these units is essential when designing lighting setups, calculating appropriate illumination levels, and assessing the efficiency of light sources. For instance, in a parking lot, foot-candles would relate to the amount of light on the ground surface beneath the light, rather than the output of the light itself. This is important for ensuring that areas requiring certain light levels are receiving them, which is crucial for electrical construction and safety.
Since lux and foot candles represent the same concept of light intensity, they can be converted from one unit to the other. The conversion factor is approximately 10.76, meaning one lux is roughly equal to 0.0929 foot candles. To convert lux to foot candles, divide the lux value by 10.76, and to obtain lux, multiply the foot candle value by the same factor.
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Lux is the metric unit of measurement in the International System of Units (SI)
Lux (lx) is the metric unit of illuminance or luminous intensity in the International System of Units (SI). It measures the amount of light that falls on a surface in lumens per square meter (lm/m²). In other words, one lux is the amount of illumination provided when one lumen is evenly distributed over a surface area of one square meter. This is also equivalent to the illumination that would exist on a surface where all points are one metre away from a point source of one international candle (candela).
Lux is used to quantify the amount of light in one square meter and is the internationally accepted illuminance unit used worldwide. It is a key metric in the field of lighting design, helping to determine the appropriate level of illumination for various applications. Lux measurements are typically used for indoor applications, such as offices, homes, and commercial spaces.
The unit "lux" is derived from the Latin word for "light". As with other SI units, SI prefixes can be used with lux, for example, 1 kilolux (klx) is 1000 lx. Lux is commonly used in Europe and other parts of the world.
To convert lux to foot-candles, which is the imperial unit of measurement, the lux value is divided by the conversion factor of approximately 10.764, as one square meter is equal to 10.76391 square feet. So, for instance, 100 lux is equal to approximately 9.29 foot-candles.
Understanding the distinction between lux and foot-candles is important when designing lighting setups, calculating appropriate illumination levels, and assessing the efficiency of light sources.
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Foot candles are the imperial unit of measurement
The foot candle is defined as the illuminance of the inside surface of a one-foot-radius sphere with a point source of one candela at its centre. One candela is a unit of luminous intensity, and the foot candle is derived from this. The name 'foot candle' comes from the original name for candela, which was 'candle'. One foot candle is equivalent to the illumination cast by light with a luminous flux of one lumen on a surface of one square foot.
Foot candles are used in a variety of settings. They are often used in outdoor settings, such as sports fields, parking lots, and roadways. In cinematography, incident light meters are used to measure the number of foot candles present, which are then used to calculate the intensity of motion picture lights. This allows cinematographers to set up the correct lighting-contrast ratios when filming.
Foot candles are also used in horticulture, where the intensity of light is the primary factor in photosynthesis. In museums and galleries, lighting levels must be carefully controlled to conserve light-sensitive objects such as prints, photographs, and paintings, which can fade when exposed to bright light for long periods.
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Conversion factor is 10.764, divide lux by this to get foot candles
Lux and foot candles are both units of measurement used to quantify the amount of visible light falling on a surface per unit area. Lux is the metric unit of measurement used in the International System of Units (SI) and is commonly used in Europe and other parts of the world. It measures the amount of light that falls on a surface in lumens per square meter (lm/m²). On the other hand, foot candles are imperial units of measurement widely used in the United States and other countries that follow the imperial system. Foot candles express the amount of light in one square foot.
Since lux and foot candles represent the same concept of light intensity, they can be converted from one unit to the other. The conversion factor is approximately 10.764, meaning one lux is roughly equal to 0.0929 foot candles. To convert lux to foot candles, divide the lux value by 10.764. For example, if you have an illuminance measurement of 100 lux, you can convert it to foot candles by dividing 100 by 10.764, resulting in approximately 9.29 foot candles.
Conversely, if you need to convert from foot candles to lux, multiply the foot candle value by the conversion factor. For instance, if you have a foot candle measurement of 10, you can convert it to lux by multiplying 10 by 10.764, resulting in approximately 107.64 lux. This conversion factor is derived from the fact that there are approximately 10.764 square feet in one square meter.
Understanding the distinction between lux and foot candles is essential when designing lighting setups, calculating appropriate illumination levels, or assessing the efficiency of light sources. These conversions enable professionals in various fields, such as lighting design, photography, cinematography, and horticulture, to make informed decisions about lighting conditions and ensure optimal illumination for specific applications.
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Foot candles are used in the US, lux is used in Europe and elsewhere
Lux and foot candles are both units of measurement used to quantify the amount of light falling on a surface per unit area. They are important metrics in the field of lighting design and can help determine the appropriate level of illumination for various applications.
Foot Candles
The foot candle is the imperial unit of measurement and is widely used in the United States and other countries that still follow the imperial system. One foot candle equals one lumen per square foot. Foot candles express the amount of light in one square foot. Foot candles are often used in outdoor settings, such as sports fields, parking lots, and roadways.
Lux
Lux is the metric unit of measurement used in the International System of Units (SI). It measures the amount of light that falls on a surface in lumens per square meter (lm/m²). Lux is commonly used in Europe and other parts of the world. Lux measurements are typically used for indoor applications, such as offices, homes, and commercial spaces.
Converting Lux to Foot Candles
Since lux and foot candles represent the same concept of light intensity, they can be converted from one unit to the other. The conversion factor is approximately 10.764, meaning one lux is roughly equal to 0.0929 foot candles. To convert lux to foot candles, divide the lux value by 10.764, or multiply foot candles by 10.764 to obtain lux.
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Frequently asked questions
Lux and foot candles are both units used to measure illuminance, or the amount of light received per unit area. However, they differ in terms of the area they define: lux defines the area being lit as a one-meter square, while foot candles define it as a one-foot square.
To convert lux to foot candles, divide the lux value by the conversion factor, which is approximately 10.764. For example, 100 lux is equal to approximately 9.29 foot candles.
Lux measurements are typically used for indoor applications such as offices, homes, and commercial spaces, and are commonly used in Europe and other parts of the world. Foot candles, on the other hand, are often used outdoors in settings like sports fields, parking lots, and roadways, and are widely used in the United States and other countries that follow the imperial system.
