Incandescent light bulbs and fluorescent tubes are not really suitable for modulation, but they are yesterday's lighting technology.

白炽灯和日光灯的光其实并不适合调制，不过它们已是旧式的照明技术了。

LEDs are one of the most energy-efficient lighting technologies that currently exist, according to the U.S. Department of Energy.

据美国能源部称，LED 是目前最节能的照明技术之一。

In a bid to make Copenhagen the world's first carbon-neutral city by 2025, scientists in the Danish capital are testing a variety of new street lighting technologies.

为了使哥本哈根到2025年成为世界上第一个碳排放为零的城市, 位于丹麦首都的科学家们正在测试各种各样的街道照明新技术。