For which applications are LEDs expected to be energy-efficient alternatives?
When LEDs replace filtered white light sources or colored neon lamps in many signage, decorative and signaling applications, they will often be viable and efficient alternatives. In automotive displays, such as dashboards, the relatively long life of this source is beneficial because they help to prevent needs for replacement when lamps burn out.
At present, the efficiency of LED systems to produce white light has already begun to exceed that of incandescent lamps. Illumination-grade white LEDs range from 20 to 24 lumens/watt. Overall, properly designed LED lighting systems can be more efficient than incandescent, making them suitable for applications where low light levels are appropriate, such as decorative pathway lighting. Again, their life characteristics are important factors.