The average human emits approximately 95 watts of energy as heat in the form of infrared light. A standard 100 watt incandescent light bulb emits only about five percent of its energy as visible light, the rest is given off as heat in the form of infrared light. This means the average human produces the same amount of heat as a 100 watt light bulb. Want to read more? Subscribe to one of our monthly plans to continue reading this article.