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Did you know that our exposure to light can have an effect on our mood? Sometimes this can be strong enough to make people depressed and tired all of the time. When a person is more strongly affected and feels depressed (especially in the Winter) they might have SAD (Seasonal Affective Disorder).
Now that the days are beginning to get longer in the Northern Hemisphere, many people with SAD may notice an improvement in their moods. This is even more likely the further North you live.
Lighting in our work or school environment can also affect our moods. I noticed a difference in my lab when we would have a big project that required starting work around 3:30 AM for weeks at a time. I read about SAD (Seasonal Affective Disorder) and experimented with different lighting in my lab at the university.
In our lab, those who came in to work around 3:30 AM performed better with very bright white lighting. I even found that adjusting the light temperature and filters on the microscopes made us more attentive. I got the idea for increasing the lighting by reading about SAD.
SAD seems to be more common in the far North where winter day length is much shorter and with people who don't spend much time outside during the daytime. It affects mood and can even cause depression.
Less severe reactions to lower light and shorter days may be called Winter Blues. This is where people are affected to the point that they have less energy but are not actually depressed. If this is interesting to you, please search the internet and read some more.
Do you think lighting makes a difference to you at your home, work or school?
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