We use LEDs (light-emitting diodes) for several reasons. First, LEDs are highly energy-efficient, using up to 80% less energy than traditional incandescent bulbs, which can lead to significant cost savings on electricity bills. Second, LEDs have a longer lifespan than other types of bulbs, reducing the need for frequent replacements. Finally, LEDs are available in various colors, can be dimmed, and emit little to no heat, making them versatile and ideal for various lighting needs in homes, businesses, and public spaces.