And I have 100 of them.

How fitting.

40 Watt incandescent lamp

100 Watt incandescent lamp

200 Watt incandescent lamp

No, your flashlight is meant to illuminate.

For us, we're very facile around electricity.

The light bulb has burned out.

So I have one light bulb there.

I'm going to number them one through 100.

But I think you get the point.

So what's our question?

Here are the cables coming up into this light fixture.

As you might guess doing so would take a huge amount computation for even the most modest scene.

36, 49, 64, 81, and 100.

A little bit of differential, but not much.

The response to a bad idea

Well, let me actually just draw them.

So the first light bulb is light bulb one.

The fifth light bulb would have been on and it'll stay on.

So the first pass, I switch every light bulb.

Four times four is 16.

We talked about the fit from data and we even talked about multivariate Gaussians.

Or I could say, I know that I'm going to switch light bulb 51, because 17 is a factor of 51.

So for example, if we're looking at light bulb eight.

lasers, portable X Rays, shielding for nuclear reactors, compact discs, hybrid vehicle motors,

But the pay off is really enormous.

Light bulb two will be off.

The algorithm is amazingly simple.

Edison invented the light bulb.

The light is out.

You know, this type of bulbs produces a lot of heat.

Noticed a bulb was out.

(Knocks)

And on this slide, I'm basically explaining all the problems you have.

So light bulb one will stay on.

The fourth light bulb will stay off, because I'm not touching it.

And then we have these aircraft cabins.

So there's 40 lightbulbs' worth for transport, 40 lightbulbs' worth for heating, and 40 lightbulbs' worth for making electricity, and other things are relatively small, compared to those three big fish.

Now this one will be off.

The second pass, I switch every other light bulb or every second light bulb.

Thomas Edison invented the light bulb.

Thomas Edison invented the light bulb.

Light bulb three will be on.

On the vertical axis, I'm going to show you how many lightbulbs what our energy consumption per person is.