They are to regular conductors what a laser beam is to a light bulb.
相比起来，超导体之于常规导体，就像一束激光之于一个灯泡。
Powerbeam's solution is to fit a small fluorescent bulb to the receiving device so that a camera on the transmitter can track the light and steer the laser beam accordingly.
Powerbeam公司的方案是为接收设备配备一枚小型荧光灯泡，这样传输器的摄像头就能跟踪光线，并适时引导激光束方向。
LED bulb delivers highly intense beam with an approximate lifetime of 100,000 hours.
LED灯泡提供了一个近似的100,000小时寿命高强度的光束。
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