- City: Banff
- Province: Alberta
- Expires: This ad has expired
supplement for help It is rare that we need artificial light sources during the day, unless we are in a closed space that does not have windows. While the day is good for light, night is a different story. How many of you can remember a time when we did not have cell phones, advanced electronic devices or low-energy bulbs (compact fluorescent lights or CFLs) and rely on good tube lamps or low-voltage bulbs to light our homes?
Our body has an internal clock that activates it during the day and numbs at night. This circadian rhythm is responsible for keeping us alert and attentive, and depends to a large extent on external light. The average duration of a circadian rhythm is 24 hours and a quarter (24 hours and 15 minutes). This varies in people who have late nights or those who work night shifts.
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