Dr. Glen Jeffery

I can't do it very easily in the afternoon.

And I think this comes from a very myopic point of view, which is we think about mitochondria as purely as things that make energy.

They do lots of other things.

And my interpretation is that in the afternoon, well, the standard lab joke is they're doing the ironing.

They're doing other things that as organelles they need to do.

They are over a period of a day, they're making contact with other organelles in the cell, particularly something called the endoplasmic reticulum.

They're junctioning with that.

We've got such a limited view of what they do.

I was surprised to find that a mitochondria at 9 o'clock in the morning was not a mitochondria at 4 o'clock in the afternoon.

That poses some very serious problems about the interpretation of our data if people are doing things at different times of day.

There is the difference between something that has an effect and then the efficiency of that effect.

So if you take a 670 nanometer...

light source, and you do exactly that, you will have an effect.

Now, as we're going forward, we're finding, certainly we're finding the energy at which you give that wavelength is dropping and dropping and dropping and still effective.

So you don't need a very bright light.

No.

No, you don't.

So we were, the original experiments

They used watts.

They measured it in watts, not lux.