Answer: Less than 5%, about 25%, up to more than 80%.
Answer analysis: LED has significant advantages in energy conversion efficiency. Specifically:
The energy conversion efficiency of incandescent lamps is very low, usually less than 5%.
The energy conversion efficiency of fluorescent lamps is much higher than that of incandescent lamps, reaching about 25%.
The energy conversion efficiency of LED is even higher, up to more than 80%. This means that LED can save 70% to 90% of electricity at the same brightness.
Therefore, LED is significantly better than incandescent and fluorescent lamps in energy saving effect, and is an ideal choice for green lighting.