根據IEC 60598-1:2003.查得定義為:
Semi-luminaire:
Unit similar to self-ballasted lamp but designed to utilize a replaceable light source and /or starting device.
Note1: The Lighht source component and/or starting device of a semi luminaire is readily replaceable.
Note2: The ballast component is not replaceable and is not disposed of each time a light source is replaced.
Note3: A lampholder is required for supply connection.
Note4: For examples and further infomation, See IEC 60972.

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