灯火管制

quán shì lì kè shí xíng bàn dēng huǒ guǎn zhì

全市立刻实行半灯火管制。

The city was dimmed out in no time.

zhè jiā yī yuàn zhuāng yǒu bèi yòng fā diàn xì tǒng yǐ fáng dēng huǒ guǎn zhì

这家医院装有备用发电系统以防灯火管制。

The hospital has an auxiliary power system in case of blackout.