Philips Wake-up Light HF3550 Operated by iPhone App - Manual (Page 5)

Remember to leave the app running overnight to
ensure the Wake-up Light wakes you up at the set
alarm time in the morning. The “Bell” symbol on
your Wake-up Light is a confirmation that an alarm
is set for the next day.
2c. Fall-asleep function
Your Wake-up Light can help you drift off to sleep
by gradually decreasing the light and/or sound for
5 to 60 minutes. The light decreases from bright
daylight to warm evening light. At the end of the
set duration, the light and sound turn off
completely.
Before you start the fall-asleep function, turn on
the light to the level you like. The dimming will
start from that intensity. If you change the light
intensity or volume during the dimming, the light
will stay at that intensity until the end of the set
dimming time (for example to give you enough
light to read a little longer), and then turn off.
The fall-asleep function can only be started by
docking your iPhone after selecting the dimming
settings. If you undock during the dimming time,
the light will continue to decrease, but the music
will stop. Don’t forget to dock your iPhone and
leave the app open before you go to sleep to
ensure the Wake-up Light wakes you at the set
alarm time in the morning.
You can stop the fall-asleep function by turning off
the light and sound with the light and sound
buttons of your Wake-up Light at any time. Your
programmed alarms for the next morning are still
active.
2d. The light source
The light source in your Wake-up Light is a unique
arrangement of high-power LEDs (Light Emitting
Diodes) designed to mimic the colors of a natural
sunrise from deep morning red to bright daylight
and give you the optimal wake-up improvement.
Because of the long lifetime of LEDs, the light
source in this device is not replaceable.
The high-power LEDs make your Wake-up Light
very energy-efficient: the maximum power