I use a SAD light as soon as I wake up to go from groggy and useless to fully alert in a couple of minutes. Most mornings I'm sitting at my desk and working within 7 minutes of waking up. It's one hell of a productivity hack.
What is sleep inertia?
I used to have a hard time getting up in the morning, especially in the winter. I'd wake up groggy and have to force myself to get out of bed. But getting up, turning on some lights, having a drink of water, and using the bathroom didn't seem to help me get my brain working. Sound familiar?
Everybody experiences a groggy feeling after they wake from a deep sleep. Scientists call it sleep inertia. It can last up to 30 minutes.
Coffee won't help
Most people reach for their favorite caffeinated beverage in the morning to help get their brain firing on all cylinders. But it takes caffeine 30-45 minutes to kick in and sleep inertia usually wears off on its own before that happens. Plus, your brain adapts to caffeine, which leads to reduced effectiveness as a stimulant (and possibly dependence).
What's a SAD light?
It's a special light therapy device designed to treat seasonal affective disorder, which is a kind of depression associated with low light levels people experience in the fall and winter.
Here's the one I have.
It puts out 10,000 lux, blocks UV, and the light strikes my eyes from above--all the important characteristics of an effective light therapy device.
Can a SAD light treat sleep inertia and/or morning grogginess?
I believe it can. I'm not aware of any studies backing this up but, in my experience, if I spend even a couple of minutes sitting in front of my SAD light, my grogginess completely disappears.
My normal procedure is:
- to wake up at the same time every day (even on weekends)
- get to my desk as fast as I can
- turn on my SAD light and start working. (I work with the bright light shining into my eyes from beside my monitor. I become fully alert almost immediately)
- after an hour I turn it off, have breakfast, and leave it off for the rest of the day
How I discovered this productivity hack
I used to spend a couple of weeks working outside every summer. I was part of a crew using helicopters to spray herbicide on young forests in northern Alberta, Canada (very fun job). We started our days in the dark so we would be ready to spray as soon as light broke.
I saw stuff like this every morning.
We napped in the afternoons when it was too windy to spray and then worked until after dark.
Those were long days but I noticed that my brain worked surprisingly well as long as I was outside in the daylight. I also noticed that my chronic sleep problems disappeared when I was living and working outdoors. But that they would reappear when I went back to the city and I saw something like this in the mornings.
So that got me thinking about the level of light in my office compared to outside. I learned that even a very overcast day is still much, much brighter than your average office. That lead me to read the research on seasonal affective disorder. I was fascinated and inspired to do an experiment.
My theory is that humans are adapted to living outdoors near the equator. Our ancestors woke with the rising of the sun and went to sleep when the sun set. I believe that living indoors and using artificial lights is messing with our circadian system. I also believe that I can help my body figure out what it's supposed to be doing in the morning by exposing myself to some simulated sunlight (when the real stuff isn't available).
My wife uses a different kind of light to help her wake up
Interestingly enough, my wife also has trouble getting up in the morning. I bought her a Philips Wake-Up Light Alarm Clock that simulates the sunrise by slowly turning on a bunch of LEDs for about 20 minutes before her desired wake-up time. She loves it. It's a total game changer.
Some warnings before you try this yourself
I am not a doctor. And I am not qualified to give medical advice. I'm not telling you what I do. It's up to you and your doctor to figure out what's right and safe for you.
Beware of products claiming to be light therapy boxes. There are dozens of them on Amazon and elsewhere. They are completely unregulated and they might not be safe or effective:
- dangerous levels of UV light are my biggest concern (you don't want cataracts and/or skin damage)
- they might not work because they aren't bright enough or they emit the wrong frequency of light
- this is a more complete list of warnings
The light therapy box I bought was nearly the same one used in a research study that proved that they work for SAD (it's same light from the same company with a different stand). There are much cheaper options out there but I wanted something that was proven to actually work.
Finally, if you think you might have a sleep or mood disorder, don't self-treat with a light therapy box. Being unusually tired or depressed can be a sign of a serious health problem. If in doubt, get that checked out by your doctor just like I did.
Results
I've been using my SAD light for more than 7 years and it helps me work productively right after I wake up. Without the light box, I struggled to get my brain working for the first half hour of my day, especially when the days are shorter. So if you add that up, I'm more productive for an extra 2.5 hours or more per week.
I've also experimented with using my SAD light to help me deal with a poor night's sleep. It's helped a little but it's definitely not a cure.
Additional resources
Here are some resources to help you learn more about light therapy:
- A great non-technical overview of light therapy (website)
- A survey of 29 studies establishing the efficacy of light therapy for SAD (pdf)
- Research-backed guidelines for the medical uses of light therapy (pdf)
Takeaways
I've performed experiments on myself with a SAD light to hack my brain and improve my productivity. And I thought my fellow programmers would find that interesting.
Have you experimented with light to improve your productivity or influence your mood? If so, what did you learn? If not, would you ever try? Tell me all about your experiences in the comments.
Top comments (31)
Sometimes life just makes it work that way. Say you've got kids, a family you want to spend time with, bills to pay, deadlines to meet, hobbies to enjoy... You've got to get the work done early so you can spend your free time with family on their schedule, or doing whatever it is you want to do.
I typically work before the sun is up to early afternoon so I can spend afternoons with friends or exploring while the sun is still shining. It's all about what time of day you want to be your free time and when you want to sleep.
Nice points, Josh.
Noah, it's not about burning out. I have plenty of downtime. But at my latitude (54.5 degrees) is very difficult to get moving when the days are short. Almost everyone here is affected to some degree and if it's really bad you get a SAD diagnosis.
I read the New York has 10 times more SAD that Florida and I live hundreds of miles north of New York so it follows the we'd have much more SAD here.
I saw this and thought 'is that like Alaska or something?'
Much more mundane - it's Newcastle-upon-Tyne!
It's as far north as I'd ever live. The darkness in the winters is really hard on me.
The bulk of Alaska is North of 60 degrees.
I have the phillips wake up light and it is nice in the winter, but by far the best thing for me to get going is to wake up and do some push ups or some other exercise that can get your blood pumping. And of course the #1 best thing to making waking up easier is getting enough sleep.
Getting good sleep is very important.
I've tried exercising first thing in the morning and I found it to be torture. But I have friends who swear by it. Everybody's different.
I've heard that exercising right away may even be unhealthy. So, it's better to give body some time to wake up fully and then start exercising.
It's hard to say, obviously everyone is a bit different. I usually just do a set of 30 push ups and then start getting ready for the day. I would be surprised if that much had a significant impact on your well being, but I am not an expert. The goal is of course to find what works for you, even if it what works for you is just a placebo effect.
Thanks for sharing. I often say that the hardest thing I do most days is waking up, and the second hardest is going to sleep (with so many things I still want to do). You have given me some ideas to try to speed up the first one.
This is not to say that my days are so easy. They are often a challenge. But transitioning to/from sleep has frequently been THAT difficult for me.
I would suggest a more natural approach, we are not robots
If you have that many stuff to do you can delegate, automate it and so on, we have to strive to do less work with more impact(efficiency).
This technique sounds like a hack, and I would bet that it has bad side effects on the long run (years), but I will keep it in mind for hackatons or nasty days.
There's nothing natural about sitting in front of a computer for the better part of each day in semi-darkness (aka standard office illumination).
Light therapy has a good record of safety. But this approach isn't for everyone. I just wanted to share what I do.
I was speaking about the part before sitting at the office, you are forcing your body in an unnatural way (after sleep).
All the offices I worked on had good lighting, so I never saw that problem, in a shared space or at home. At least at home I have few LEDs in each room with at least 900lumens each.
Office lighting is nowhere near the intensity of sunlight.
Office lighting - 320 - 500 lux
Full daylight but not direct sun - 10,000 - 25,000 lux
Direct sunlight - 32,000 - 100,000 lux
Source: en.m.wikipedia.org/wiki/Lux
FYI: lumins and lux are different measures.
We don't tent to notice just how dark offices are compared to outside light levels because our eyes are good at compensating. But our brains seem to need bright light to keep our body clocks in check. That's why blind people tend to have this very problem at a much higher rate than sighted people.
But, just to be clear, I'm not trying to get anybody to change what they are doing. I just wanted to share what works for me.
Cheers.
I've got stuff to do. Lots of stuff and only so many hours a day to do them so I try to maximize my productivity.
Its actually called apricity but modern psychology renames everything, pretends its a discovery and markets pills for it. Though your methods of coping with it are sufficient, personally I use my nicotine habit and Belgian Malinois' need for water the neighbor's shrubbery as an excuse to get a bit of exercise, which works better than anything for me. YMWV as anything that deals with mood or sleep.
I don't live far enough north for my apricity to become too severe (California) to require much more than 20 - 30 minutes outdoors regardless what the weather is (including in the snowy mountains which we do have in this state, but please stay where you are) and I am wide awake. I measure this, like most things I can commit to metrics without much inconvenience, so far the significant difference I feel when the fall equinox passes has not bore itself out in data, as the measurements we can even use are naturally as imperfect as those measuring are limited in perceptive capacity. Except of course if I were to take a measurement of my subjective mood, but that would be highly imprecise and thus I invest the time in other ways.
I almost want to say it's genetic. When I wake up I am ready to go or I didn't get enough sleep. To me, it is really that simple. I know that my family are all early risers and are "on" from the time we wake till the time we sleep. On the other hand, my wife isn't and a few friends are the same way she is. I will also say that I have never lived in a place further North than Chicago so there that is.
I may be just too far south to notice.
Thanks for sharing. I know nothing about it so I just looked it up and WebMD says it's banned in the US, which is interesting.
Just curious: how does your experience with it compare to caffeine in coffee? Why would you take one over the other?
Lately, when I wake up I immediately start thinking about programming. Recently, I even solved a problem when I woke up. But I'm learning things actively so I don't know if that the effect of active learning.
Light therapy is legit. But you gotta have some little exposure to UV light. It's healthy. Too much UV == bad. Too little UV == bad. Just a little bit == good.
I've woke up with the solutions to a number to programming problems over the years.
And when I was programming for my own company and putting in crazy hours I used to dream about it.
Do you get 7-8 hours sleep each night? If it's less it may also explain the grogginess.
Yes, I do. And I practice excellent sleep hygiene too.
Ah then you probably also read "Why we sleep" 😝
No, but I've read others and did an online sleep improvement course. This book looks interesting; thanks for mentioning it. I've added it to my reading list.
Yes it's interesting. Will gift the german version around my family and friends once it's out.