They had dinner under the soft glow of candlelight, creating a romantic atmosphere.

candlelight 是由 candle（蜡烛）和 light（光）组成的复合词，字面意思是"蜡烛的光"，指蜡烛燃烧时发出的柔和光线。这种光线通常能营造温馨浪漫的氛围。