Candela
Embed This Widget
Add the script tag and a data attribute to embed this widget.
Embed via iframe for maximum compatibility.
<iframe src="https://unitfyi.com/iframe/glossary/candela-def/" width="420" height="400" frameborder="0" style="border:0;border-radius:10px;max-width:100%" loading="lazy"></iframe>Paste this URL in WordPress, Medium, or any oEmbed-compatible platform.
https://unitfyi.com/glossary/candela-def/Add a dynamic SVG badge to your README or docs.
[](https://unitfyi.com/glossary/candela-def/)Use the native HTML custom element.
Définition
L'unité SI de base d'intensité lumineuse, définie en fixant l'efficacité lumineuse du rayonnement monochromatique de 540 THz à 683 lm/W.
Explication
One candela approximates the luminous intensity of a common wax candle, from which the unit takes its name. A 60-watt incandescent bulb emits roughly 60–80 candela in all directions. The candela specifically measures intensity in a given direction, making it the foundation for both lumen (total flux) and lux (illuminance) calculations.
RELATED ARTICLES
From milligrams to metric tons, this guide covers every major weight and mass unit with exact conversion factors, real-world examples, and a clear explanation of why weight and mass are not the same thing.
Temperature Scales Explained: Celsius, Fahrenheit, and KelvinA complete guide to the four temperature scales in scientific and everyday use—Celsius, Fahrenheit, Kelvin, and Rankine—including their history, conversion formulas, and where they intersect.
Power Units Guide: Watts, Horsepower, and BTU/HourPower is the rate of energy transfer — how fast work is done. This guide covers watts, kilowatts, megawatts, horsepower, and BTU/hour with real-world context from light bulbs to power plants.
RELATED TERMS
Mètre
L'unité SI de base de longueur, définie comme la distance parcourue par la lumière en 1/299 792 458 de seconde.
Kilogramme
L'unité SI de base de masse, définie par la constante de Planck.
Seconde
L'unité SI de base du temps, définie par les transitions de l'atome de césium-133.
Kelvin
L'unité SI de base de température thermodynamique, dont l'origine est le zéro absolu.
Ampère
L'unité SI de base du courant électrique.