What is the percentage reduction in power usage when using LED displays compared to incandescent?

Answer: C — 75%

LED displays are known for their energy efficiency, making them a popular choice in traffic signal applications. Compared to incandescent bulbs, which consume more energy to produce a similar level of illumination, LED lights typically offer significant power savings. The correct choice indicates that using LED technology can lead to a reduction in power usage by up to 75%. This high level of efficiency arises because LEDs convert a larger portion of energy into light rather than heat, whereas incandescent bulbs waste much of their power generating heat. Not only does this reduction in power usage make LED displays more sustainable from an environmental standpoint, but it also leads to considerable cost savings over time due to lower electricity bills and reduced maintenance needs, as LEDs have a considerably longer lifespan. This context highlights the importance of transitioning to LED technology for various applications, including traffic signals, to achieve substantial energy efficiency gains.