lux meter, and what is its use?

lux meter,

Lux meter is a device used to measure the amount of light in a given area. in order to learn more about the concept of luxury, luxury meter and the importance of light meter, we suggest you to read this article. In this article, we try to define the luxury meter and talk about its importance in different environments. And finally, let’s examine the measurement method and its measurement units.

A luxmeter, also known as a luminometer, is a device that measures the intensity of light in a certain area. Often used in photography, cinematography and other industries to provide good lighting conditions. Lux meters usually measure illuminance in lux, which is the amount of light falling on a surface. It can be carried or inserted into another device such as a camera or smartphone. A light meter is an important tool to ensure that the lighting is suitable for various tasks and activities.

What is a lux meter?

Lux meter or light meter is a device for measuring the light and brightness of the environment. This device uses luxury units, footcandles per square meter (fc) or candelas per square meter (cd/m²) to measure brightness. Some lux meters have internal memory or data logger to save and record measurements. Many lux meters have software for detailed analysis and provide various interfaces for transferring measured data to a computer.

It is interesting to know that the lux meter or light meter measures the intensity of light as perceived by the human eye. In other words, the visible spectrum has different wavelengths that can be seen by the human eye with different sensitivities. Taking this into consideration, the lux meter measures the light intensity. In the following, we discuss the concept of its measurement units.

Photometer measurement units

Talking about light measurement units may not be scientifically correct because light is not a physical quantity and cannot be measured. However, a series of parameters such as wavelength, intensity, speed, etc., which are physical and measurable properties, and these measurements help us to know more about light waves or particles and can be used in our calculations.


In other words, the light intensity emitted in one square meter of space is measured in lux units. Lux is used as a unit of light intensity in various applications such as the lighting of buildings, cars, electronic equipment, etc.


Lumen is the unit of measurement of light mass and refers to the amount of light intensity emitted by a light source at any angle. In other words, lumens indicate the amount of light emitted towards a specific point in space. Lumen is the main unit used to measure the light intensity of a light source such as LED lights, electric lamps, etc.


Candela is the unit of light intensity measurement. A candela is equal to the light intensity emitted by a specific light source in a specific direction. In other words, the candela represents the power of light radiation in a specific direction. This unit is used to measure the light intensity of strong light sources such as flash lights, lasers and other high intensity light sources.

Lux meter application

Due to the importance of light brightness in different environments, it is very important to measure light intensity with a lux meter . Considering that this device is a portable equipment, it can be easily used in different places. In general, the light meter is used in environments where the amount and intensity of light must be controlled and placed in a certain limit. For example, the lux meter is widely used in greenhouses where artificial light is used to cultivate flowers and plants. Below we mention some of these environments.

  1. greenhouses
  2. petrochemical
  3. power industy
  4. Photography and video recording
  5. Construction industry
  6. Medicine and occupational health
  7. Food industry

How does a lux meter work?

A lux meter or light meter is used to measure light intensity. The function of a lux meter is as follows:

  • Sensor: The lux meter has a sensor that can detect and receive light. This sensor  usually includes a photodiode or photoelectric cell that has the ability to convert light into an electrical signal.
  • Measurement: The lux meter sensor measures the amount of received light as an electrical signal. This electrical signal is usually converted into a corresponding voltage or current.
  • Unit conversion: Then, the electrical signal measurement unit is converted to lux unit. This conversion is usually done using an analog-to-digital converter (ADC).
  • Display: The value of light intensity in lux unit is displayed on the lux meter screen. This display usually contains a number or graph that shows the intensity of the light.

By placing the lux meter sensor near a light source, the device is able to measure the light intensity of the source and display it in lux units.

Lux meter technical specifications

The technical specifications of lux meters vary widely and may vary depending on the type of device and different applications. Some of the important technical specifications of lux meters are as follows:

  • Light intensity measurement range
  • Measurement accuracy
  • Unit of measurement
  • Sensor type
  • Screen type
  • Screen segmentation accuracy
  • The ability to connect to a computer or other devices

Finally, to buy a  suitable lux meter, it is better to compare the technical specifications of the device with your working conditions and choose a device that

suits your conditions


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