Philips HF3421 User Manual page 5

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English
which diminishes their energy levels during the day. Using Philips
EnergyUp Intense Blue at the right time of day can help you establish
and reinforce regular sleep patterns.
Light via eyes
Research shows that a special photoreceptor in our eyes is
responsible for regulating our energy, mood and sleep/wake cycles.
This receptor responds mostly to the blue light of the summer sky. We
do not get much of this light in autumn and winter. Most indoor light
does not provide enough of this essential color. This appliance helps
you to be at your best by delivering the wavelength, colour and
intensity of light to which our body responds most efficiently.
Winter blues
Lack of light during the darker winter months causes many people to
experience a noticeable drop in energy level and low spirits as
autumn sets in. These symptoms, known as 'winter blues', may cause
you to feel low, listless and fatigued for weeks or even months. This
affects both personal performance and mood. Blue light therapy is a
successful method to fight these winter blues symptoms. It provides
your body with summer vitality throughout the dark winter months.
General description
1 Light panel
2 Socket for small plug
3 Standby button and light intensity control
4 Adapter HF10
5 Small plug
Important treatment information
Read this user manual carefully and always adhere to the treatment
instructions.
Contraindications
The following conditions may be contraindications for use of this
appliance:
- bipolar disorder