The light perceived by the human eye is measured in units called lumen-hours.This is about the amount produced by burning a candle for an hour.

人眼能感知的光亮是以流明-小时为单位计量的，每流明相当于一支燃烧一小时的蜡烛产生的能量。

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The light perceived by the human eye is measured in units called lumen-hours. This is about the amount produced by burning a candle for an hour.

人眼感受的光用流明时这个单位来衡量——燃烧一根蜡烛一个小时所产生的光的量就是一流明时。

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Operators can also hold the switch down to run the flashlight in low mode, producing a 50 lumen light beam and a longer 12 hour runtime.

ENGADGET: Explosion-proof flashlight could be the first to outlive its owner

By pressing the switch once, the light operates in high mode to produce a full power 130 lumen light beam with a long 4 hour runtime.

ENGADGET: Explosion-proof flashlight could be the first to outlive its owner