How to Time Light for Optimal Sleep & Wakefulness | Samer Hattar & Andrew Huberman

Does it ? Let's say somebody is in a condition where there's a lot of cloud cover , is it important to get outside ? So I have to tell you the cloudiest day is going to be much more brighter than your room .

How to Time Light for Optimal Sleep & Wakefulness | Samer Hattar & Andrew Huberman

So I have to tell you the cloudiest day is going to be much more brighter than your room . You could ask any photographer a cloudy day unless it's really dark , dark clouds , usually cloudy days have much more bright outside than inside the room , even when you have good lighting inside the room . So I think in the outside is usually , even when it's cloudy , you're going to get enough intensity to help you adjust your cycle to the day , night cycle .

How to Time Light for Optimal Sleep & Wakefulness | Samer Hattar & Andrew Huberman

You could ask any photographer a cloudy day unless it's really dark , dark clouds , usually cloudy days have much more bright outside than inside the room , even when you have good lighting inside the room . So I think in the outside is usually , even when it's cloudy , you're going to get enough intensity to help you adjust your cycle to the day , night cycle . So how , how long do you , these are general rules of thumb ?

How to Time Light for Optimal Sleep & Wakefulness | Samer Hattar & Andrew Huberman

Ok . So then , and , and the other thing that I would like to mention to people , if , if you think it's very dim outside , let's say it's very cloudy , stay longer . So remember , intensity is only one component duration is also important because remember that the circadian system , it's not like the image system in the image system , you have to change every second because you're looking at different objects , you have to change your perception .

How to Time Light for Optimal Sleep & Wakefulness | Samer Hattar & Andrew Huberman

Let's say somebody is in a condition where there's a lot of cloud cover , is it important to get outside ? So I have to tell you the cloudiest day is going to be much more brighter than your room . You could ask any photographer a cloudy day unless it's really dark , dark clouds , usually cloudy days have much more bright outside than inside the room , even when you have good lighting inside the room .