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The
UK has 4 distinct seasons, each with its own prevailing
weather patterns and corresponding patterns and cycles
of nature. The colder, wetter seasons of autumn and
winter tend to have less or more obscured daylight,
and less likelihood of sunny days; the summer and
spring seasons are essentially the opposite. As humans
we are affected in some way by all the main forces
of nature, and our body clocks and moods can be strongly
linked to the patterns of the seasons, sun and daylight.
Maximum darkness (and a comfortable level of warmth)
for a good period of time constitutes an ideal night,
and maximum natural daylight, sun and warmth for a
good period of time constitutes the ideal day. For
most people, a good deal of the day and night in all
seasons is spent indoors, at home or in the work place.
The main contact with outside world in either case
is through the windows. Window coverings of various
types are used in the vast majority of homes and work
places to regulate light, privacy, temperature, and
visibility.
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