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What is lux?
Before we can begin talking about what lux meters are, you’ll need a basic understanding of lux. In simple terms, lux is a measurement of illuminance, which is the amount of light spread over a designated area.
You may have heard of a measurement used for light levels—lumens. While the two units sound similar, they are distinctly different.
Lumen is a measurement of luminous flux, which is the quantity of visible light emitted from a light source, such as a lamp or torch, per unit of time.
In this way, lux and lumen measurements go hand in hand. While lumens represent the amount of light coming from a given source, lux reflects how far that light spreads across a surface. Lux is equal to a single lumen per square meter.
Let’s make things even simpler with an example. The purpose of a street light is to illuminate a designated area. To measure the brightness or ‘luminous flux’ of the streetlight, you’d use lumens. However, to determine how much of the road is covered by the street light’s glow, you’d use lux.
A lux meter, then, is a tool you can use to accurately measure the light levels in a given space.
How lux meters work
The main working parts of a digital lux meter are a light sensor or photocell, a body, and a display screen. The light sensor or photocell captures light and converts it into electrical current, which the device uses to calculate the lux value. It then displays this value on a digital screen.
Some lux meter models offer additional benefits, such as recording or data logging capabilities and connectivity with other devices like mobile phones, tablets, and laptops. This way, you can automatically record your lux measurement to use at a later time.
Why you might use a lux meter
There are many reasons why you might use a lux meter to measure illuminance within a space. Some common applications include:
- Ensuring appropriate light levels within workplaces, commercial buildings, public places, schools, and hospitals
- Determining the right amount of exposure for a photograph
- Maintaining visibility and safety in indoor and outdoor environments
- Measuring light levels around machinery or on production lines
In the workplace, lux meters have become especially important thanks to growing safety concerns. Visibility is essential in workplace safety, especially around hazardous or moving equipment. Using a lux meter, you can ensure the light levels within your workspace are always suitable for maintaining full visibility without compromising on comfort.
Invest in lux meters today
Lux meters, light meters, or illumination meters are essential devices for maintaining appropriate light levels and safety across a range of industrial and commercial applications. If you need to measure illuminance in a given area, investing in a high-quality and accurate lux meter is a smart choice.
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