When we talk about energy we limit ourselves to energy produced and used by things other than humans. Eg. Energy saving lamps that have fluorescent tubes. The lamps convert electricity to light and ultimately light is consumed by humans. But the story does not end here. The light of a lamp can be used for reading a book, browsing a site, illuminating a patio, lighting a Rock Show, or even for writing a blog post.
The use of a form of energy is not yet measured according to its ultimate use. A Human Energy Index can help in quantifying the energy and its ultimate use. It would be difficult to quantify it in absolute terms like- Meter, Kilogram, Seconds etc. Rather this index can be in relative terms similar to the relativity theory of Einstein.
One prime factor of this index would be the number of people benefited by a form of energy in first person. Eg. People attending a Rock Show enjoy the lights behind the concert in person and directly. Where as those who watch a Rock Show on TV, iPhones or any other form of media are not in first person. For these people, lights generated by advanced computer graphics can produce the same effect as the original one. Therefore when we calculate the Human Energy Index of lights in a Rock Show it is the live audience that counts more than the remote audience.
Same idea can be applied to a Football Match, BasketBall Game, Presidential Debate and so on.
At micro level, a small amount of electrical energy in a portable music player provides a long duration of enjoyment to a listener. Similarly talking on a cell phone saves energy of physically going to a person. But the point here is that even with these savings we are still using a large amount of Human Energy. Eg. A person listening a songs is devoting a large amount of his time on this player. A person talking on cell phone is spending a lot of hours on unnecessary talks.
Human Energy Index is not limited to measuring utilization of energy on Human Beings. Rather it even measures use of Human Energy on Human Beings.
In the nascent stage, Human Energy Index can start with basic uses like conversion of light energy to human entertainment, connections, communication etc. But in the advanced stages the use would be to measure each and every thing that we use and spend energy on. Eg. Whether Golf is a game with less Human Energy Index or a Soccer game.
The time period of popularity of Human Energy Index is around the time when the energy savings from physical devices would be in a mature form.