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Introduction
Congratulations on your purchase and welcome to Philips! To fully benet from the support that
Philips offers, register your product at www.philips.com/welcome.
This appliance helps you wake up feeling tter and more energetic. It creates a summer dawn
experience that makes awakening and getting up easier. The light intensity slowly increases to the
chosen level during 30 minutes. Light in the morning increases the production of the cortisol
hormone that makes you feel more energetic when you wake up. You can have the appliance wake
you up by light only or by light and sound. The appliance can also be used as a reading lamp.
Light and the biological clock
Exposure to light regulates the biological clock that controls the body’s circadian rhythms. The
melatonin level rises in the evening, preparing our body for sleep and lowering the core body
temperature. The light in the morning stimulates the secretion of the hormone cortisol, which makes
us awake and alert. Optimally, the circadian rhythms are in sync with our sleep-wake rhythm.
Disturbed sleep and circadian rhythms can severely impact our health, performance and productivity.
In autumn and winter, when the days are shorter and darker, many people experience tiredness and
need more sleep. Lack of energy and trouble to get up in the morning are common symptoms of
the winter blues. Other symptoms may be unexpected mood changes, concentration problems and
a craving for food rich in fattening carbohydrates. Some people may even develop a serious
depression (seasonal affective disorder or SAD), which disappears when spring comes.
The effects of dawn simulation
The Philips Wake-up Light gently prepares your body for waking up during the last half hour of
sleep. In the early morning hours our eyes are more sensitive to light than when we are awake.
During that period the relatively low light levels of a simulated natural sunrise elevate the cortisol
level shortly after awakening. Clinical studies have shown that regular use of a dawn simulator can
alleviate even the severest symptoms of the winter blues, improving productivity and concentration.
In addition, people who use the Wake-up Light wake up more easily, have a better overall mood in
the morning and feel more energetic. With the Philips Wake-up Light, you can set the light level that
corresponds to your light sensitivity for optimum dawn simulation.
For more information about the health benets, see www.philips.com, search word “Wake-up Light”.
General description (Fig. 1)
A Base
B Vents
C Lamp housing
D Top control panel
1 SNOOZE/SCREEN BRIGHTNESS CONTROL button
2
@& button (light on/off)
3
3 button (light and sound on/off)
4
# button (sound off)
E 100W lamp (HF3462/HF3461) or 75W lamp (HF3451)
F Lamp replacement hatch
G Bottom control panel
1
@ wheel (turn to set the light intensity)
2 ALARM button
3 RADIO button (HF3462/HF3461 only)
4 QUICK CHECK button
5
$ wheel (turn to set volume)
H Display section
1
% button
2 Time indication
ENGLISH