gaslights

Before the electric light bulb , people used candles or gaslights to provide light for homes and offices.

在电灯泡发明以前，人们使用蜡烛或者煤气灯来为家里和办公室提供照明。

However, gaslights were smoky and candles carried the risk of fire.

然而，煤气灯是有烟的，而蜡烛很容易引起火险。