Dr. Glen Jeffery

And does color matter?

Like I'm wearing a black shirt right now.

No, makes no difference whatsoever.

And the other thing we do not know, and this is terribly important, there's lots of we don't knows here, is...

This long wavelength light bounces around all over the place.

So we've got some long wavelength light sources, and I think I'm shining this long wavelength light there, right?

And then when I put my instrumentation up, it's all over the place.

Inside the body, inside the room.

It's going everywhere.

I can't control it.

Not unless I start putting...

Materials like aluminium foil to block it.

So when we think about long wavelength light, it's advantages.

We talk about using this device or that device.

What we also need to think about is, okay, you've got a small device with a small beam of light going here.

It's bouncing all around the room.

It's coming in from a different angle and different parts of your body.

But you cannot assume that the point source is the only source of that long wavelength light if you're in a confined space.

It was on a small area of the back, yeah.

And I must make it very clear, first of all, the person whose idea this was was my colleague, Mike Powner.