有效光谱范围 useful spectral range ; [分化] effective spectral range
有效光学密度范围 Useful density range
有效光程长度 effective path length
实效光圈 effective aperture
有效光照时间 Lighting time
密效光阑 effective diaphragm
有效光阑 effective stop ; effective sop
等效光强 equivalent power
有效光 Actinic lighting
等效光强探测器 equivalent power detector
虽然要比被替换机种的能效大得多，但是光这一点还不够。能否完成计划中的订购数需要足够的时间去证明。
Although a far more capable aircraft than those it is replacing, it may not be useful enough for long enough to justify the size of the planned order.
光源采用高光效、长寿命气体放电灯光源。
Light source with high luminous efficiency, long-life gas discharge lamp.
尝试不同的光照强度。蛇更喜欢再光效较弱或者完全黑暗的情况下进食。
Try different light intensities. Snakes are usually happier to feed in subdued lighting or indeed total darkness.
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