A red lamp is used as a danger signal.

红灯用作危险信号。

Sparks were emitted from small black boxes and red lamps flashed on and off angrily.

小黑盒子里迸出火花，红色灯泡发怒似地忽明忽暗。

A young woman stumbled over a bit last night, and fell against my garden-railings; directly she got up I saw her look towards his infernal red lamp with the pantomime-light.

昨晚有个年轻女人绊了一跤，倒在我花园的栏杆上；她一站起来，我就看到她用哑剧灯看着他那可恶的红灯。