1.  lumen depreciation
2.  light attenuation
3.  light failure

• 1. 光衰: Lumens depreciation | Light failure | luminous attenuation
• 2. 光衰减器: optical attenuator | Variable Optical Attenuator
• 3. 可调光衰减器: VOA | MEMS VOA

更多释义

• 1.采用铝合金外壳，散热好，光衰小。
  Aluminum enclosure, good cooling, light a small decline.
  dict.yoduao.com
• 2.高亮度，光衰低，能耗低，寿命长。
  High brightness, low attenuation, low energy consumption, long service life.
  dict.yoduao.com
• 3.光衰小、寿命长，寿命长，价格高。
  A small decline, long service life, long service life, high price.
  dict.yoduao.com

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