As a side note, this is not referring to the color that is emitted from LEDs. When people say “green”, they are referring to how efficient and environmentally-friendly a product is. In terms of how green LED lights are, it is safe to say that they are almost as green as it gets. You already know how energy-efficient they are but because of this, they do not need as much electricity to be made and require lower emissions from power plants. But, they also do not contain mercury so that is another bonus to the environment.
On top of this, they do not generate as much heat as a traditional light, such as an incandescent light bulb. Finally, due to their long life, they do not need to be disposed of as frequently.