Brightness of the spot light led

      In the lighting lamps, the brightness of the lamp is generally used to measure the lumen. The luminous flux unit. The luminous intensity of 1 Candela (CD) the brightness of the spot light led, luminous flux emitted in the unit solid angle for the "1 lumens, abbreviation" (LM).
      The so-called lumen, simply refers to the brightness of the light of the candle displayed on a meter outside. The flux is from the perspective of human physiology. It is described the light source unit time radiation generated visual corresponding strength, unit is the lumen, also called brightness. An ordinary 40 watt incandescent lamp, the luminous efficiency is about 10 lumens per watt, therefore can be issued 400 lumens of light.
      Here we take a cabinet led mini spot light as an example, to illustrate the brightness LED lamp. Luminous flux of the lamp is 500lm/450lm, power is 7W, the input voltage is AC90-265V. As you can see, the lamp luminous flux is 500lm, and 40W incandescent lamp general almost. While the LED lights only needs 7W. Therefore, LED spotlights the photoelectric conversion rate is high, but very low power.

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The above article from Sourcechip official website (http://www.sc-ledlights.com/)
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