foot lambert 英尺朗伯 ; 朗伯 ; 尺兰伯特 ; 呎朗伯
N a former unit of luminance equal to the luminance of a surface emitting or reflecting 1 lumen per square foot. A completely reflecting surface illuminated by 1 foot-candle has a luminance of 1 foot-lambert 朗伯; 旧亮度单位 ( abbr: ft-L)
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