How do you feel in the winter when light levels are reduced? Do you become fed-up, weary or even depressed? This phenomenon is quite widely documented and has the acronym of SADS. SADS is or can be pretty serious, but there are almost certainly many many more people who simply feel a 'bit down' when the sunlight dims. Artificial bright light was invented to help these people.
If, after you have been in the office or wherever you work inside for a few hours, you become tired or listless, it is
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