In daily life, most people think that the power of LED lights is directly related to their brightness. However, delving deeper into the subject reveals that this is not the case. While wattage does play a role in energy consumption and electricity usage, it is not the key factor in determining how bright a light will be. Instead, the key factor is luminous flux.
Power is measured in watts (W) and represents the work done by an object per unit time. The higher the power rating, the greater the energy and power consumption, but this is only a reference factor and not the main determinant of brightness. On the other hand, luminous flux, measured in lumens (LM), quantifies the amount of light that the human eye can perceive per unit area. The higher the lumen rating, the brighter the light emitted.
To calculate the brightness of a lamp, you must consider light efficiency, measured in lumens per watt (LM/W). Different light sources with the same luminous flux have different energy consumption. The higher the luminous efficiency, the less energy is consumed under the same luminous flux. The calculation formula of luminous flux is luminous flux = light efficiency * power.
For example, consider two lamps: a 36W lamp with a luminous efficiency of 80lm/W emits a luminous flux of 2880lm, and a 30W lamp with a luminous efficiency of 110lm/W emits a luminous flux of 3300lm. In this example, even though the 30W lamp has a lower power rating, it is brighter than the 36W lamp because of its higher luminous flux.
In summary, it is obvious that the luminous flux determined by luminous efficiency and power is the main factor that determines the brightness of the lamp. Understanding this difference can help consumers make informed decisions when choosing LED lights to meet their lighting needs.
Post time: Jun-06-2024