光效能 meaning in English

light transmittance efficiency
luminous efficacy

Luminous efficacy of a source
发光效能
Led module is made with led of high brightness and wide viewing angle 60 , it have great ray effect , energy saving and environmental - protecting . the life time is about 50000 - 80000hours , and work with low voltage dc12v . the imput current of each module is 25ma , red , yellow , blue , green , white etc color are available
Led模组使用寿命长50000 - 80000hrs .模组省电低成本： 12vdc低电压高光效能， led模组比霓红灯节省电力70 % . led模组广角度均匀色泽： led广告发光模组角度范围60 - 160度