Lux and lumens are two different measurements of light, but they are often confused. Lux measures the amount of light that falls on a particular surface, while lumens measure the total amount of light emitted from a source. In this article, we'll take a closer look at the difference between lux and lumens, and how they are used in the lighting industry.
What is Lux?
Lux (symbolized as lx) is a unit of illuminance or light intensity. It measures the amount of light energy that falls on a surface and is expressed in lumens per square meter (lm/m2). To put it in context, a single lux is equal to the amount of light that falls on a surface one meter away from a single candle.
What is Lumens?
Lumens (symbolized as lm) measure the total amount of light emitted by a source. It takes into account the amount of light, the beam angle, and the distance from the source. Lumens measure the total light emitted from a source, regardless of where it is directed. Put simply, lumens measure the total amount of light, while lux measures the intensity of light.
How are Lux and Lumens Used?
Lux and lumens are both important when it comes to lighting. When selecting lighting fixtures, it's important to consider both measurements. Lux is typically used to measure the amount of light present in a certain area, while lumens are used to measure the total amount of light emitted from a source. This is important to consider when selecting lighting fixtures for a particular space, as you want to make sure you have enough light to properly illuminate the area.
Lux is also used in photography to measure the amount of light falling on a subject. Photographers use lux to determine the exposure settings for a particular shot. Lumens, on the other hand, are often used to measure the brightness of a particular light source.
Conclusion
Lux and lumens are two different measurements of light. Lux measures the amount of light that falls on a particular surface, while lumens measure the total amount of light emitted from a source. When selecting lighting fixtures, it's important to consider both lux and lumens. Lux is also used in photography to measure the amount of light falling on a subject, while lumens are used to measure the total amount of light emitted from a source.
Frequently Asked Questions
What is lux?
Lux (symbolized as lx) is a unit of illuminance or light intensity. It measures the amount of light energy that falls on a surface and is expressed in lumens per square meter (lm/m2).
What is lumens?
Lumens (symbolized as lm) measure the total amount of light emitted by a source. It takes into account the amount of light, the beam angle, and the distance from the source.
What is the difference between lux and lumens?
The main difference between lux and lumens is that lux measures the amount of light that falls on a particular surface, while lumens measure the total amount of light emitted from a source.
How are lux and lumens used?
Lux and lumens are both important when it comes to lighting. Lux is typically used to measure the amount of light present in a certain area, while lumens are used to measure the total amount of light emitted from a source. Lux is also used in photography to measure the amount of light falling on a subject, while lumens are used to measure the total amount of light emitted from a source.
What is a lux meter?
A lux meter is a device used to measure the amount of light that falls on a surface. It is typically used to measure the amount of light in a particular area or to measure the amount of light falling on a subject in photography.
What is a lumen meter?
A lumen meter is a device used to measure the total amount of light emitted from a source. It takes into account the amount of light, the beam angle, and the distance from the source.
How do I calculate lux?
To calculate lux, you will need to know the total amount of light emitted by the source, the area of the surface, and the distance from the source. The formula is lux = lumens / (area * distance2).
How do I calculate lumens?
To calculate lumens, you will need to know the total wattage of the source and the beam angle. The formula is lumens = wattage x beam angle / 2π.
How do you convert lux to lumens?
To convert lux to lumens, you will need to know the area of the surface and the distance from the source. The formula is lumens = lux x area x distance2.
How do you convert lumens to lux?
To convert lumens to lux, you will need to know the area of the surface and the distance from the source. The formula is lux = lumens / (area * distance2).
What is the difference between lux and foot-candles?
The main difference between lux and foot-candles is the unit of measurement. Lux is measured in lumens per square meter (lm/m2), while foot-candles are measured in lumens per square foot (lm/ft2).
What is the difference between lumens and watts?
The main difference between lumens and watts is the unit of measurement. Lumens measure the total amount of light emitted from a source, while watts measure the amount of energy consumed by a source.