illuminating engineering society methods
18. Photometric test should follow IES, Illuminating Engineering Society methods LM79-08 as a completed fixture with LED's installed, and all components in the enclosed housing, what is shown as (LLF) Light Lose Factors?
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illuminating engineering society methods
照明工程学会方法
以上为机器翻译结果，长、整句建议使用 人工翻译 。