"luminous flux" meaning in English

{
  "forms": [
    {
      "form": "luminous fluxes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "luminous flux (countable and uncountable, plural luminous fluxes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
        },
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          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
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          "source": "w"
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          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
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          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Physical quantities",
          "orig": "en:Physical quantities",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "In photometry, the measure of the power of light as perceived by the human eye, in proportion to the power at each wavelength."
      ],
      "id": "en-luminous_flux-en-noun-4aSJ3fpe",
      "links": [
        [
          "photometry",
          "photometry"
        ],
        [
          "light",
          "light"
        ],
        [
          "eye",
          "eye"
        ],
        [
          "wavelength",
          "wavelength"
        ]
      ],
      "related": [
        {
          "word": "lumen"
        },
        {
          "word": "SI unit of measurement"
        },
        {
          "word": "luminous energy"
        }
      ],
      "synonyms": [
        {
          "word": "luminous power"
        }
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "Translations",
          "word": "valovirta"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "Translations",
          "tags": [
            "masculine"
          ],
          "word": "flux lumineux"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "Translations",
          "word": "Lichtstrom"
        },
        {
          "code": "el",
          "lang": "Greek",
          "roman": "foteiní roḯ",
          "sense": "Translations",
          "tags": [
            "feminine"
          ],
          "word": "φωτεινή ροή"
        },
        {
          "code": "ja",
          "lang": "Japanese",
          "roman": "kōsoku",
          "sense": "Translations",
          "word": "光束"
        },
        {
          "code": "ro",
          "lang": "Romanian",
          "sense": "Translations",
          "tags": [
            "neuter"
          ],
          "word": "flux luminos"
        },
        {
          "code": "tl",
          "lang": "Tagalog",
          "sense": "Translations",
          "word": "liwanaging himaymay"
        }
      ],
      "wikipedia": [
        "luminous flux"
      ]
    }
  ],
  "word": "luminous flux"
}

{
  "forms": [
    {
      "form": "luminous fluxes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "luminous flux (countable and uncountable, plural luminous fluxes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "lumen"
    },
    {
      "word": "SI unit of measurement"
    },
    {
      "word": "luminous energy"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "English uncountable nouns",
        "Translation table header lacks gloss",
        "en:Physical quantities"
      ],
      "glosses": [
        "In photometry, the measure of the power of light as perceived by the human eye, in proportion to the power at each wavelength."
      ],
      "links": [
        [
          "photometry",
          "photometry"
        ],
        [
          "light",
          "light"
        ],
        [
          "eye",
          "eye"
        ],
        [
          "wavelength",
          "wavelength"
        ]
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "wikipedia": [
        "luminous flux"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "luminous power"
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "Translations",
      "word": "valovirta"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "Translations",
      "tags": [
        "masculine"
      ],
      "word": "flux lumineux"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "Translations",
      "word": "Lichtstrom"
    },
    {
      "code": "el",
      "lang": "Greek",
      "roman": "foteiní roḯ",
      "sense": "Translations",
      "tags": [
        "feminine"
      ],
      "word": "φωτεινή ροή"
    },
    {
      "code": "ja",
      "lang": "Japanese",
      "roman": "kōsoku",
      "sense": "Translations",
      "word": "光束"
    },
    {
      "code": "ro",
      "lang": "Romanian",
      "sense": "Translations",
      "tags": [
        "neuter"
      ],
      "word": "flux luminos"
    },
    {
      "code": "tl",
      "lang": "Tagalog",
      "sense": "Translations",
      "word": "liwanaging himaymay"
    }
  ],
  "word": "luminous flux"
}