The greater the power of LED lamps, the brighter the brightness?

                                                                                                                                                                                                                                                                                                                                             2025-02-24

In daily life, the vast majority of people think that the greater the power of LED lamps, the brighter the brightness; In most cases, this is true on the surface, but if you dig down to it? The answer is no, judging the brightness of a lamp is not bright enough, not the size of the power, but the luminous flux.

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 LED luminance

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Power refers to the work done by the object in unit time, unit watt: W, the higher the power of the lamp, the more energy is consumed, the more electricity is used. However, this is not a key factor affecting the brightness of the lamp, and can only be used as a reference factor.

 Luminous flux refers to the amount of light that the human eye can perceive in a unit area, unit lumen: LM, the greater the lumen, the higher the brightness, which is the most critical factor that directly determines the brightness of the lamp.

The brightness of the lamp can be calculated, but it is also necessary to know another necessary parameter: the efficiency of light, the unit is lumen/watt: LM/W, different light sources emit the same luminous flux, the less energy consumed, the higher the luminous efficiency. Luminous flux = luminous efficiency * power.

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 LED luminaires luminous flux lumens

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Let’s look at an example: know the power of the luminaire, calculate the luminous flux emitted by the luminaire per unit time

The 36W lamp has a luminous efficiency of 80lm/W and a luminous flux of 2880lm.

A 30W lamp has a luminous efficiency of 110lm/W and a luminous flux of 3300lm.

Through the above example, we can obviously see that the luminous flux of 30W lamps is larger than that of 36W lamps, so 30W lamps will be brighter than 36W lamps, and the luminous flux determines their brightness.

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