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Results tagged with luminous-flux
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user 91176
Anything related to the *luminous flux* emitted by a light source. The luminous flux is a physical quantity used in photometry to measure the amount of light power radiated from a light source that can be perceived by the human eye. Its unit of measurement in the SI is the *lumen* (lm).
5
votes
Accepted
Human perceived (relative) brightness of indicator LEDs
I finally got my hands on some known diodes (as opposed to grab bag stuff) and adjusted them to equal perceived brightness (3 human observers) at a comfortable intensity for viewing from 15 feet (4.5m …
- 386
4
votes
2
answers
4k
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Human perceived (relative) brightness of indicator LEDs
Humans looking at colored lights each at the same luminescence perceive yellow as the "brightest" color. Green is somewhat dimmer, and red is very much dimmer. Using a common formula for calculating …
- 386