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2. Luminous efficacy - Wikipedia

   en.wikipedia.org/wiki/Luminous_efficacy

   Luminous efficacy. Luminous efficacy is a measure of how well a light source produces visible light. It is the ratio of luminous flux to power, measured in lumens per watt in the International System of Units (SI). Depending on context, the power can be either the radiant flux of the source's output, or it can be the total power (electric power ...

3. AirPods Pro - Wikipedia

   en.wikipedia.org/wiki/AirPods_Pro

   AirPods Pro. AirPods Pro are wireless Bluetooth in-ear headphones designed by Apple, initially introduced on October 30, 2019. [ 5][ 6] They are Apple's mid-range wireless headphones, available alongside the base-level AirPods and the highest-end AirPods Max . The first-generation AirPods Pro use the H1 chip, also found in the second-generation ...

4. Luminous flux - Wikipedia

   en.wikipedia.org/wiki/Luminous_flux

   Luminous flux (in lumens) is a measure of the total amount of light a lamp puts out. The luminous intensity (in candelas) is a measure of how bright the beam in a particular direction is. If a lamp has a 1 lumen bulb and the optics of the lamp are set up to focus the light evenly into a 1 steradian beam, then the beam would have a luminous ...

5. The 12 best affordable AirPods alternatives — starting at ...

   www.aol.com/article/lifestyle/2020/10/19/best...

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6. Lumen (unit) - Wikipedia

   en.wikipedia.org/wiki/Lumen_(unit)

   The lumen (symbol: lm) is the unit of luminous flux, a measure of the perceived power of visible light emitted by a source, in the International System of Units (SI). ). Luminous flux differs from power (radiant flux) in that radiant flux includes all electromagnetic waves emitted, while luminous flux is weighted according to a model (a "luminosity function") of the human eye's sensitivity to ...

7. AirPods Pro 2 vs AirPods 3: which are better? - AOL

   www.aol.com/news/airpods-pro-2-vs-airpods...

   Are AirPods 3 good enough, or should you buy the AirPods Pro 2? Here are the key differences in pricing, specs and features. AirPods Pro 2 vs AirPods 3: which are better?