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Tip:We advise a light intensity between 9 and 20 (for the HF3451 with 75W lamp) or between 7 and 15 (for the HF3462/HF3461 with 100W lamp) for the alarm function. Set the light intensity to your own preference by trying out the alarm function at different light intensity levels.

2If you do not want the light to go on at wake-up time, select light intensity level 0.

Quick alarm check

1Press the QUICK CHECK button to start an accelerated wake-up alarm test (Fig. 15).

,The light ring round the QUICK CHECK button goes on (Fig. 16).

,During the first 50 seconds of the test, you see a rapid increase of the light intensity to the selected level. During the last 40 seconds, you hear the selected sound gradually increase to the selected level.

2Press the QUICK CHECK button again to stop the test (Fig. 15).

,The light ring round the QUICK CHECK button goes out.

Note:The appliance continues to run the accelerated wake-up alarm test until you press the QUICK CHECK button.

Switching the alarm on or off

The light ring round the ALARM button burns when the alarm is on. At the set time, the wake-up sound is played and the lamp has reached the selected light intensity level.

1Press the 3 button to switch off the light and the wake-up sound. (Fig. 17)

,The light ring round the ALARM button continues to burn.The alarm function is still active and the wake-up alarm will go off at the set time and with the set sound and light intensity the next day (Fig. 11).

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Press the # button if you want to switch off the sound when the alarm goes off. (Fig. 18) Press the @& button if you want to switch off the lamp when the alarm goes off. (Fig. 19)

If you want to switch off the alarm function altogether, press the ALARM button one or more times until there is no sound symbol on the display and the light ring round the ALARM button goes out.

Snoozing

Press the SNOOZE/SCREEN BRIGHTNESS CONTROL button to switch off the sound for 9 minutes when the alarm has gone off (Fig. 20).

The lamp continues to burn at the selected intensity level. After 9 minutes, the wake-up sound is automatically played again.

2Press the SNOOZE/SCREEN BRIGHTNESS CONTROL button longer to dim the light.

Note:You can only do this once. After you release the button, it functions as SCREEN BRIGHTNESS CONTROL button again.

Note:You can only use the snooze function within 15 minutes after the alarm starts to go off. After those 15 minutes, the button no longer functions as SNOOZE button and only functions as

SCREEN BRIGHTNESS CONTROL button.

Adjusting the light intensity during the wake-up phase

1Turn the light adjustment wheel @ to select a higher or lower light intensity. (Fig. 14)

The lamp burns at the selected intensity during the rest of the wake-up phase.

Adjusting the brightness of the display

1Press the SNOOZE/SCREEN BRIGHTNESS CONTROL button to adjust the brightness of the display (Fig. 20).

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Philips HF3451 manual Quick alarm check, Switching the alarm on or off, Snoozing, Adjusting the brightness of the display
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HF3451 specifications

The Philips HF3451 is an innovative wake-up light designed to enhance the waking experience by simulating a natural sunrise. This product stands out in the market for its ability to mimic the gradual increase in daylight, helping users to wake up more gently and naturally.

One of the key features of the HF3451 is its ability to gradually increase the light intensity over a period of 20 to 40 minutes before the alarm time is set. This progressive light increase simulates the experience of a natural sunrise, easing people out of sleep and reducing the jarring effects of a traditional alarm clock.

In addition to its natural wakes-up feature, the HF3451 also offers a variety of sound options. Users can choose from different nature sounds, such as birds chirping or gentle streams, to accompany the light, providing a more serene waking environment. Furthermore, there's an FM radio feature that allows users to wake up to their favorite radio station, adding an extra layer of personalization to the waking experience.

The design of the Philips HF3451 is sleek and modern, fitting seamlessly into various bedroom aesthetics. It features a large, easy-to-read display that provides clear visibility even in low light. The adjustable brightness of the display ensures it does not disturb your sleep while maintaining a functional aspect.

Durability and energy efficiency are also important characteristics of the HF3451. The light utilizes LED technology, which is known for its long lifespan and lower energy consumption. This makes it not only environmentally friendly but also cost-effective over time.

Moreover, the HF3451 includes a snooze function that allows users to enjoy a few extra minutes of rest before the light and sound resume. Its intuitive design makes it user-friendly, with touch-sensitive buttons positioned for easy access.

Overall, the Philips HF3451 combines advanced technology with user-centric features to create a unique and beneficial waking experience. By seamlessly integrating light therapy and sound to enhance the waking process, it caters to those looking to improve their morning routine and overall well-being.
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