做LED的 来讨论下这个吧
在加拿大 我在EERE上看到这个术语解释的，不怎么看的懂。向高手求教！ L70: shorthand for lumen depreciation to 70% of initial lumen output; stated conversely, it indicates 70%lumen depreciation. L50 would be lumen depreciation o...华人论坛
在加拿大 我在EERE上看到这个术语解释的，不怎么看的懂。向高手求教！ L70: shorthand for lumen depreciation to 70% of initial lumen output; stated conversely, it indicates 70%lumen depreciation. L50 would be lumen depreciation o...华人论坛