What is a Digital Lux Meter?

Digital Lux Meter
Digital Lux Meter

A lux meter commonly referred to as a light meter is a device that measures brightness. The lux meter is a device that measures brightness by the intensity with which it appears to the human eye. The measurement of actual light energy produced by or reflected from an item or light source differs from this method. A lux is a unit of brightness or illuminance measurement. It is derived from the candela, which is the standard unit for measuring light power. This meter measures the intensity of illumination as seen by the human eye, rather than an objective value of energy radiated or reflected.

The visible spectrum has several wavelengths that appear to the human eye with varying sensitivity, and the lux meter will take this into account when measuring light intensity.

What is the Purpose of a Lux Meter?

A lux meter is a gadget that measures brightness according to how a human eye will perceive it or how it appears to a human eye. It is used to determine the amount of light in the workplace. Low lux levels are a major cause of muscle pain and weariness.

With an integrated photodetector, the lux meter measures brightness. For optimal exposure, the photodetector is oriented perpendicular to the light source. An analog instrument or a digital LCD are used to display readouts. Basic operator inputs are included in digital types. Measurements can be saved on digital meters, and the detecting range can be adjusted. Photodetectors will be made of selenium or silicon, and their brightness will be determined by photovoltaics. The captured light is then transformed into an electrical current, which is then measured to get the lux value.

What are the Features and Specs of a Lux Meter?


  • Cosine function – the light entering the photodetector may be refracted, causing measurement inaccuracy, which some photodetectors can correct.
  • The maximum ambient temperature at which the photodetector can function successfully is called the operating temperature. Above 1200 degrees Fahrenheit, photodetectors might be destroyed.
  • Range refers to the light meter’s dynamic detection range, which is measured in lux or foot-candles.


  • If an electronic lux meter is left unattended for an extended period, it will automatically shut off.
  • Backlit – to measure low light, the LCD panel features a backlighting option.
  • Battery indicator – because a low battery might cause meter readings to fluctuate, a battery indicator is useful.
  • Filters – this option allows the user to filter particular wavelengths from the measurement, such as backlight.
  • Memory and USB — The memory option will be important for storing measurements, while the USB ports can be used to connect to a computer as well as charge the device.
  • Outdoor – the meter is designed for use in situations where there is a significant
  • The difference in light intensity.


How do I Pick a Lux Meter?

When purchasing a lux meter, it is critical to understand the measuring range, resolution, accuracy, and maintenance requirements to acquire reproducible results. The setting in which the lux meter is used must also be considered. A larger measuring range would be required for outdoor use.

Before taking the measurement, it’s a good idea to calibrate the meter.

How to use a Lux Meter to Take a Reading?

To take a quick reading to expose the light meter sensor to the area to be measured, and to connect the sensor to the device via cable It will resemble a white bulb; check the reading on the display, and the reading will be completed.


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