Dr. Samer Hattar

I don't think that's wrong if you somehow can block that light from affecting your circadian clock.

I am an extreme, but I measured it for myself and I asked Reji, my wife, if she's okay with it.

She also liked the dimness.

Both of us can see well in dim conditions, but I think you have to measure it for yourself.

You really have to do, it's a very simple experiment.

Just try to dim the light as much as you can.

I call it the minimum amount of light you require to see comfortably.

You know, use red light that is very dim if you want to keep the room for sleeping.

Red light that is very dim has very small effect on circadian clock.

And below 10 lux of red light literally doesn't affect sleep at all.

So if you just look on the side, most of the light is going to go this way and you're only seeing this.

And even when I check sometimes, I check it so fast and switch it off so fast.

So ideally, I should not check.

iPhones and iPads.

I don't use iPad at night because it's hard to lower it enough because it's huge.

But even my iPhone, I try not to use it at night.

I mean, eventually, because we're talking about the whole system, eventually when you start having the other problems, you also develop sleep problems, but you're absolutely right.

And in fact, now research from Diego Fernandez in the lab have found that now we know that they actually require different brain regions.

So we don't only have a theory,

We don't only have a light environment that showed they can be dissociated.