Can you tell me about LED lights and what the big deal is about them? What are the other bulbs besides LED? Write the answer in a neutral, professional tone as if showing a high authority of knowledge for commercial website copy material. The explanation must also use a familiar tone that acknowledges a simple "What is" question to introduce the explanation. The goal is that it could be understood by the general population or anyone looking for light bulbs to purchase. 
Your potential website copy:

When it comes to the question "What is LED lighting?" you may want to know the difference between LED bulbs and prior incandescent bulbs. 

The difference exists in how these two types of bulbs work. 

Traditional incandescent bulbs have a thin metal sheet or "filament" that heats up and produces glowing light when electricity passes through it. 

As for LED bulbs, they work via an electrical current passing through a semiconducting material or "diode." These diodes cast light when connected to electricity and do not rely on heat to produce light, which also increases the energy efficiency of LED bulbs as compared to incandescent bulbs. 

Hope this helps. 