Dr. Glen Jeffery

The last thing to go into a building is the lighting.

It is the very last that goes in after the glass, okay?

Where do you take your cut on your over expenditure?

You take your cut on the lighting, you buy the cheapest LEDs you can, and the cheapest LEDs have got the restricted spectrum.

And to add insult to injury on this, to retain thermal regulation of the building, all commercial buildings and all big buildings now, not domestic ones, will invariably have infrared blocking glass.

So you get the first hit on the fact that your LEDs are pretty awful.

undermining your mitochondria.

The second is you are isolated from the visual world outside by the infrared blocking glass.

This is double here.

And I think that double here is quite significant.

Now, we have had a major, probably one of the world's largest architects firms that have just won a very big contract in the USA for a hospital walk through the door and say, what is this about healthy lighting?

And I know they're putting their money on the table on this one because they have a vast area where all the architects sit.

It's like a aircraft hangar.

And they're stripping out all the LEDs.

Okay.

Let's backtrack a little bit, particularly about the kids and screens.

So

Myself and a load of my colleagues have sat with a blue screen staring at it all day for days.

Mind-bogglingly boring thing to do.

It had almost no effect.