{"id":21931,"date":"2026-07-09T17:35:20","date_gmt":"2026-07-09T14:35:20","guid":{"rendered":"https:\/\/www.electrocover.com.gr\/loumenlouxkantelakelvin\/"},"modified":"2026-07-10T15:52:12","modified_gmt":"2026-07-10T12:52:12","slug":"loumenlouxkantelakelvin","status":"publish","type":"post","link":"https:\/\/www.electrocover.com.gr\/en\/loumenlouxkantelakelvin\/","title":{"rendered":"Lumen, Lux, Candela, Kelvin"},"content":{"rendered":"\t\t
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Lumen, Lux, Candela, Kelvin<\/h4> \n\t\t\t\t\t\t\t<\/div>\n\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Basic Lighting Units<\/h2>\n

Lumen (lm) \u2013 Luminous Flux<\/h3>\n

The Lumen (lm)<\/strong> is the SI unit (International System of Units) of luminous flux<\/strong>. It expresses the total amount of visible light emitted by a light source, as perceived by the human eye.<\/p>\n

Luminous flux differs from radiant flux, which measures the total emitted radiation energy regardless of human vision.<\/p>\n

The Lumen is defined in relation to the Candela:<\/p>\n

1 lm = 1 cd \u00d7 1 sr<\/strong><\/p>\n

(sr = steradian \/ solid angle)<\/em><\/p>\n

\n

Candela (cd) \u2013 Luminous Intensity<\/h3>\n

The Candela (cd)<\/strong> is the SI unit of luminous intensity<\/strong>. It expresses the intensity of light emitted by a light source in a specific direction.<\/p>\n

For example, a common candle emits approximately 1 candela<\/strong>.<\/p>\n

1 cd = 1 lm \/ 1 sr<\/strong><\/p>\n

(sr = steradian \/ solid angle)<\/em><\/p>\n

\n

Lux (lx) \u2013 Illuminance<\/h3>\n

The Lux (lx)<\/strong> is the SI unit of illuminance<\/strong>. It is used in photometry to measure the amount of light falling on a surface per square meter.<\/p>\n

1 lx = 1 lm \/ m\u00b2<\/strong><\/p>\n

\n

Kelvin (K) \u2013 Color Temperature<\/h3>\n

The Kelvin (K)<\/strong> is used to measure the color temperature<\/strong> of a light source.<\/p>\n

Color temperature describes whether light appears warm (yellowish) or cool (white or bluish).<\/p>\n

    \n
  • The lower<\/strong> the Kelvin value, the more warm<\/strong> (yellowish) the light appears.<\/li>\n
  • The higher<\/strong> the Kelvin value, the more cool<\/strong> (white or bluish) the light appears.<\/li>\n<\/ul>\n

    Due to the different materials used in their construction, light sources emit light with different color temperatures.<\/p>\n

    Indicative Color Temperatures<\/h4>\n
      \n
    • Warm White:<\/strong> up to 3,000 K<\/li>\n
    • White \/ Bright White:<\/strong> approximately 3,500 K<\/li>\n
    • Cool White:<\/strong> from 4,000 K<\/li>\n
    • Daylight:<\/strong> from 5,000 K and above<\/li>\n<\/ul>\n

      A classic incandescent bulb usually has a color temperature between 2,700 K<\/strong> and 3,300 K<\/strong>.<\/p>\n\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

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