Zhu said some trains on the Bejing-Zhangjiakou line are "smart" as they provide 5G signals and wireless charging for passengers, as well as intelligent lighting.

朱说北京到张家口线上的一些火车很“智能”。车上有 5G 信号覆盖，为乘客提供无线充电以及智能照明。

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MIT's work is attracting attention from lighting companies as well.

MIT的工作同时也引起了照明业公司的注意。

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On an individual level, people can help reduce much sky glow by using lighting only when necessary and by choosing well shielded lighting fixtures.

就个人而言，仅在必要时使用照明，且选择遮光性能好的照明设备，就能有助于大幅减少人工白昼现象。

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Helsinki Airport, for example, has cut its carbon dioxide emissions by nearly 2, 500 tonnes compared to 2011, by making heating, ventilation and lighting more energy-efficient, as well as using electrically-operated vehicles.

BBC: Airports doing more to go green

Elsewhere, agents have access to mobile lighting units, as well as hand-held infra-red cameras akin to night-vision goggles.

ECONOMIST: The Republicans are fretting about a disappearing problem

Now he employs 28 people and runs a factory that ships, each week, lighting systems as well as two tractor-trailers full of air filters.

FORBES: Magazine Article