These light-emitting diodes could simulate red light.

这些发光二极管可以模拟红光。

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To test their hypothesis, researchers took some electrical lights, actually, they were light-emitting diodes.

为了验证他们的假设，研究人员使用了一些电灯，实际是使用了发光二极管。

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Semiconductor lasers and light-emitting diodes

半导体激光器和发光二极管

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Light-emitting diodes are small glass lamps that use much less electricity than traditional bulbs and last much longer.

VOA: special.2009.12.21

He began experimenting with light-emitting diodes, LEDs,at his laboratory at the University of Calgary in Alberta.

VOA: special.2009.12.21

Subjects stared into a light box containing light-emitting diodes (LEDs) for 60 minutes in each experiment.

WSJ: Skin Cancer, Driving and Men

Light-emitting diodes--semiconductors that emit light when electricity passes through them--have been around since the 1960s.

FORBES: Bright, Very Bright

Made by Dutch electronics giant Philips, the bulb swaps filaments for light-emitting diodes to provide illumination.

BBC: Philips LED bulb