Dr. Glen Jeffery

This is an issue on the same level as asbestos.

This is a public health issue and it's big.

And I think it's one of the reasons why I'm really happy to come here and talk because it's time to talk.

When we use LEDs, the light found in LEDs, when we use them, certainly when we use them on the retina looking at mice, we can watch the mitochondria change.

gently go downhill.

They're far less responsive.

Their membrane potentials are coming down.

The mitochondria are not breathing very well.

Watch that in real time.

Yeah, sure.

We think about light purely in terms of the light we see, and that's perfectly natural.

And the light we see runs from deep blue, violet, out to pretty deep red, deep bicycle light.

And that's what we see.

That's what we're aware of.

The trouble is that actually there's a lot more of it than that.

The sun kicks out a vast amount of light that we don't see.

So let's say the visual range is, just grab the numbers, which is, say, 400 to 700.

That's our spectrum.

Nanometers.

Yeah, nanometers.