system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 Why are LED lights so much brighter yet more energy efficient?
gpt
Incandescent light is electricity going through a solid causing lots of heat in the process thus loss of power. 

CFL/ Halogen lights is electricity through gas. Much easier to go through with higher voltage  so less heat. 

LED is basically a mini lightning bolt with a mirror in the back. Very easy to jump through thus little power needed.