"lighting up" meaning in English

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          "ref": "1958 September 23, “Swindon's First Main-Line Diesel Locomotive”, in Railway Magazine, page 604:",
          "text": "The locomotive is fitted with a train heating boiler situated in the central compartment. After the initial lighting up the boiler is completely automatic and adequate safeguards are provided.",
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        "Present participle and gerund of light up."
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          "ref": "1958 September 23, “Swindon's First Main-Line Diesel Locomotive”, in Railway Magazine, page 604:",
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