• 1. 灯的光度: lamplight
• 2. 来自灯光方向的宽度: Width From Light Dir
• 3. 灯具的光度数据: Photometric data for luminaires

• 1.球状烛光是所有灯的光度输出的度量标准。
  Mean Spherical Candle Power is a measure of total lamp photometric output.
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• 2.白天在家里使用蓝光度较高的节能灯是个好主意，在晚上则使用蓝光量可能最低的节能灯。
  At home, it is a good idea to use energy-efficient lamps with a higher proportion of blue light during the day, and in the evening use ones with the lowest possible amount of blue light.
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• 3.介绍了721型分光光度计，灯电源电路和稳压电路故障现象，分析了故障产生的原因，提供了排除故障办法，对该仪器维修提供了借鉴的经验。
  This paper introduced some common faults of 721 spectrophotometer, found out the cause of formation, and presented fixing method, it may be used for instrument maintenance for reference.
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