English, Introduction, Light and the biological clock – Philips HF3475 User Manual

Page 6: The effects of the wake-up light, General description (fig. 1)

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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.

The Philips Wake-up Light helps you wake up more pleasantly. The light intensity of the lamp

gradually increases to the set level in the 30 minutes before the set wake-up time. The light increases

the production of energy hormones and prepares your body for waking up in a very natural way. It

also makes you feel more energetic. To make waking up an even more pleasant experience, you can

use natural wake-up sounds or the FM radio. The sleep timer allows you to read or listen to music

before you go to sleep and switches off the light or radio after a set time.

light and the biological clock

Exposure to light regulates the biological clock that controls the body’s sleep-wake rhythm. The level

of the hormone melatonin rises in the evening, preparing our body for sleep. The light in the

morning stimulates the production of the hormone cortisol, which makes us awake and alert.

Optimally, the sleep-wake rhythm is in sync with the rhythm of our daily life. This is often not the

case in modern life, as we often have to wake up when it is still dark.

the effects of the Wake-up light

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. People who use the Wake-up Light wake up more easily, have a better

overall mood in the morning and feel more energetic. Starting the day with the Wake-Up Light may

have a positive effect on your productivity and concentration. Because the sensitivity to light differs

per person, you can set the light intensity of your Wake-up Light to a level that matches your light

sensitivity for an optimal start of the day.

For more information about the Wake-up Light, see www.philips.com.

general description (Fig. 1)

a

Vents

B

Lamp housing

c

Mains cord

D

Antenna

E

Display

1 Light symbol

2 Hour indication of clock time/alarm time

3 Clock time symbol

4 Alarm symbol

5 Radio symbol

6 ’Birds’ sound symbol

7 ‘Beep’ sound symbol

8 ‘African jungle’ sound symbol

9 ‘Wind chimes’ sound symbol

10 Sleep timer symbol

11 Display brightness symbol

12 Minute indication of clock/alarm time

13 Sound level symbol

F

Function selection wheels

1 Top selection wheel: light on/off and light intensity

2 Middle selection wheel (SET): menu and radio frequency

3 Bottom selection wheel: radio on/off and volume

g

Control lever with ‘alarm off’, ‘alarm on’ and ‘snooze’ positions

EnglisH

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