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。

youdao

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。

youdao

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。

youdao

Pulsars are a special type of neutron star that rotates rapidly, emitting a beam of high-energy that spins much like the bulb in a lighthouse.

MSN: Runaway star may be fastest pulsar yet - Technology & science - Space - Space.com | NBC News