Luminance: Cd/m2, Explained Simply - Technical Tips

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• Dec 24, 2025
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In the case of information to the Display brightness of the Smartphones you can often find the unit of cd/m2. This describes the luminance of the device. What is the unit exactly means and what values are recommended, you will learn in this practical tip.

Light density as a proxy for the degree of brightness

• The unit is cd/m2 sets the photometric value of cd (abbreviation for Candela) in relation to the surface of the display, expressed in square meters.
• Candela is the unit of measurement for light. The brightness of a smartphone is directly of the light depends on its thickness. A candle, for example, the cd value of 1. A Light Bulb 60. The higher the Candela, the higher the brightness.
• The same is also true for cd/m2. Only this indication of the light refers to the density on a surface and not, as in the case of the light strength to a point. The luminance in cd/m2, so how much light of a notional of 1 square meter is delivered a great Smartphone.
• In summary, the luminance is the surface brightness that the human eye perceives.
• Sometimes, the light density in the "Nit". This is used mainly in the US market, but it values not a part of the normalized SI -.

Which the luminance is perfect for my Smartphone?

• Common models have between 300 and 400 cd/m2. Conventional Computer display screens and LED video walls, only 200 to 300 cd/m2.
• Generally it can be said that the luminance can't be for Smartphones is high enough. The Display is too bright, you can turn it easily with the brightness slider to the darker.
• Of particular importance is the light to get density when using mobile devices in bright sunshine. The high brightness of the surroundings makes the screen only appear black. Smartphones with a high cd/m2-number are here clear in the advantage. A Prime example is the Samsung Galaxy S8with about 700 cd/m2 in the summer, perfect to use is.

You should not forget to clean your screen constantly. What are you Cleaning Smartphone and Tablet, be sure to observe the need to learn on the next page.

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