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Philips HF3421 Manual

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Introduction
Congratulations on your purchase and welcome to Philips! To fully
benefit from the support that Philips offers, register your product at
www.philips.com/welcome.
Read this user manual carefully before using this Philips appliance.
Intended use
This Philips appliance EnergyUp Intense Blue is intended to make
people feel more energetic, to adjust circadian rhythms and to
provide relief from the winter blues. Medical intended use of this
appliance is to treat winter depression or SAD (seasonal affective
disorder). Treatment of SAD must always take place under medical
supervision.
Light - a natural energizer
Today's busy modern lifestyles demand peak performance all day
long. Even the fittest person suffers energy dips, particularly when
deprived of natural daylight, such as in an office in winter. Daylight is
essential to well-being, keeping fit and feeling energized throughout
the day – just like healthy nutrition and regular exercise. Philips
EnergyUp Intense Blue mimics the natural energizing power of
daylight on a bright sunny day. It stimulates special receptors in the
eye to trigger the body’s natural response to sunlight. This helps you
to fight energy dips, to feel more energetic, active and alert, and to
improve your mood.
Circadian rhythms and sleep patterns
The human body uses light cues, such as those provided by the sun,
to time certain internal functions. Properly timed rhythms regulate
energy, mood, sleep, appetite and digestion. These daily internal
cycles, called circadian rhythms, sometimes fall out of sync with
nature, which can have impact on our well-being. Nature’s cues no
longer govern our modern lifestyle. Our day no longer starts at sunrise
and ends at sunset, working days are getting longer, and many
people work in shifts. Moreover, our activities often extend well into
the night. Many people tend to get too little sleep during the week,
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