什么是平均流明
平均流明，也称为设计流明，用于描述灯泡在其额定寿命内产生的平均光输出。
贺拉斯-贺
什么是 PN 交界处
PN 结是一种基本元件，特别是在 LED 灯的工作中。它指的是 P 型半导体和 N 型半导体之间形成的结。
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Transistors, on t
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什么是法令（市政）
Ordinances (municipal) refers to regulations or rules implemented by a municipality (local government) regarding outdoor lighting practices.
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