Philips Wake-up Light HF3521/01

Name: Philips Wake-up Light HF3521/01
Brand: Philips
SKU: 964792
Price: 139.9 EUR
Availability: SoldOut
Rating: 6.9 (5 reviews)

Review is 6,9 out of 10, based on 5 reviews.
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Product information
Accessories
Reviews
Specifications

Product information

Key specs

	Type of alarm clock	Wake-up light
	Radio reception type	FM
	Number of alarms	2
	Alarm clock volume control
	Charge phone using USB
	Radio
	Power supply type	Power grid
	Snooze function

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Pros and cons

According to our alarm clock expert

This alarm clock provides a realistic sunrise simulation, as the light changes from red to orange to yellow.
You can choose from 6 natural alarm sounds to wake up relaxed.
It's possible to set 2 alarm times, like one for you and one for your partner.
You can't connect the alarm clock to an app that gives you advice for the best possible night's sleep.

Description

With the Philips Wake-up Light HF3521/01, you wake up naturally. This alarm clock imitates the light of a sunrise. The light changes from soft red to orange in 30 minutes, and then to bright yellow. In addition to the light, the alarm clock also wakes you up with sound. You can choose between the radio or 6 alarm sounds, like whistling birds or waves. You can set 2 different alarm times. This way, you can set a wake-up time for yourself and your partner. You can also use the alarm clock when falling asleep, as it can also imitate the sunset. The light dims slowly, so that your body can prepare itself to go to sleep. With the night light function, you can use the alarm clock as a night light. In this mode, you have soft and dimmed light.

Tips for using this product

Included by default

Manual(10.94 MB)
Charger

Reviews

Rating

5 stars

4 stars

3 stars

2 stars

1 star

Rating per section

Sound quality

Review is 4,0 out of 10.

Price-quality ratio

Review is 8,0 out of 10.

Alarm options

Review is 6,0 out of 10.

Most helpful reviews

Review is 4,0 out of 10.

Nice appearance, but otherwise very mediocre

Looks nice
Just rolls over if you're not careful

Nice appearance, but otherwise very mediocre

Review by:
Berthold
Date:
27 October 2025
Translation:
Automatically translated from Dutch

Review is 8,4 out of 10.

Satisfied with the purchase

I've had the wake-up light for a month now, and I'm very happy with it! I don't find the buttons particularly intuitive (it took some getting used to, finding the right button to turn the light off while half asleep while my girlfriend wanted to sleep through the night), but of course, you get used to it after a while. It's nice that you can adjust the light intensity and the time it takes to fade in. The light itself is also warm and pleasant.

Review by:
Daan
Date:
1 December 2025
Translation:
Automatically translated from Dutch

Review is 5,2 out of 10.

falsely advertised, no radio, topples over.

Falsely advertises FM radio, which it doesn't have

I bought this for the FM radio. Coolblue advertises it to have an FM radio. It does NOT have an FM radio. Also, it topples over really easily. Who would have expected that from a round object?

Review by:
M de Boer
Date:
20 April 2026

Specifications

Product

Product
	Product number	964792
	Manufacturer code	HF3521/01
	Brand	Philips
	Warranty	2 years
	Processing of your defect	Via Coolblue

General properties

General properties
	Type of alarm clock	Wake-up light
	Controls on playback device	Follow function, Next/previous, Play/pause, Preset stations, Set alarm, Volume
	Built-in speakers
	Night lighting
	Relaxation function

Watch properties

Watch properties
	Data display	Digital
	Hour display
	Minute notation
	Shows seconds
	Date display
	Color screen
	Backlit screen

Alarm properties

Alarm properties
	Number of alarms	2
	Week/weekend alarm clock
	Number of alarm sounds	6
	Alarm type	Light, Radio
	Alarm clock volume control
	Rising alarm volume
	Snooze function
	Sleep timer
	Sleep trainer

Wireless connectivity

Wireless connectivity
	Bluetooth
	Built-in WiFi
	NFC
	Charge other devices wirelessly
	Controls via app

Playback options

Playback options
	Radio
	Radio reception type	FM
	Type of radio tuner	Digital

Audio properties

Audio properties
	Headphone jack

Connectivity

Connectivity
	USB port
	Charge phone using USB

Light alarm clock properties

Light alarm clock properties
	Light simulation
	Colored sunrise simulation	Yes, from red via orange to yellow
	Sunset simulation	Yes
	Type of light simulation	Colored sunrise, Yellow sunrise, Zonsondergang

Physical properties

Physical properties
	Width	19,2 cm
	Height	19,9 cm
	Depth	14,6 cm
	Weight	1,11 kg
	Color	White

Power supply

Power supply
	Power supply type	Power grid
	Cable length	1,5 m
	Backup battery

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Philips Wake-up Light HF3521/01

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Product information

Key specs

Pros and cons

Description

Tips for using this product

Included by default

Reviews

Rating

Rating per section

Most helpful reviews

Nice appearance, but otherwise very mediocre

Satisfied with the purchase

falsely advertised, no radio, topples over.

Specifications

Product

General properties

Watch properties

Alarm properties

Wireless connectivity

Playback options

Audio properties

Connectivity

Light alarm clock properties

Physical properties

Power supply

Related products

Product information

Key specs

Pros and cons

Description

Tips for using this product

Included by default

Reviews

Rating

Rating per section

Most helpful reviews

Nice appearance, but otherwise very mediocre

Satisfied with the purchase

falsely advertised, no radio, topples over.