Changing building codes, evolving tastes, and the high cost of maintaining those wonderful old signs have businesses embracing LEDs, which are energy efficient but still carry great cost.

不断变化的建筑规范，逐渐发展的品味，以及维护这些美妙的旧标识的高昂成本，让企业欣然接受了发光二极管，它们节约能源但成本仍然很高。