Then it introduces a new method to test luminaire efficiency, and point out it should be called luminaire light output ratio according to the present test method.
文中给出了一种真正衡量灯具效率的方法，并指出按目前测试方法得到的比值应该称为灯具光输出比。
Then it introduces a new method to test luminaire efficiency, and point out it should be called luminaire light output ratio according to the present test method.
文中给出了一种真正衡量灯具效率的方法，并指出按目前测试方法得到的比值应该称为灯具光输出比。
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