Best value · Sunrise alarm clocks
Philips SmartSleep Wake-up Light (HF3520)
by Philips
Rated to 300 lux with a 20 to 40 minute sunrise, sunset, 5 wake sounds and FM radio for about $107. No app, no subscription.
Specs
| Peak brightness | 300 lux (no distance given) |
|---|---|
| Sunrise length | 20-40 min |
| Sunset mode | Yes |
| Sounds | 5 + FM radio |
| App required | No |
| Subscription | None |
| Brightness levels | 20 |
| Light colors | Red to orange to yellow |
| Alarms | 2 |
| Display | Self-adjusting brightness |
| Snooze | Tap, 9 min |
| Power backup | Clock time only, 4-8 hours |
| Dimensions | 19.2 x 19.9 x 14.6 cm |
| Weight | 730 g |
| Warranty | 2 years |
Specs from the manufacturer and the sources listed below. Last verified Oct 20, 2026.
Good
- 300 lux rated peak, close to the HF3650, for roughly $70 less
- Adjustable 20 to 40 minute sunrise covers the 30-minute trial protocol
- Two alarms, sunset mode and FM radio with no app or Wi-Fi
- More than 14,000 Amazon ratings, a long track record for a wake-up light
Not so good
- Philips' US product page shows no price or buy button; buy it through Amazon
- Amazon's review summary says some owners find it too complicated to program
- Only 5 wake sounds, no phone charging, and the backup keeps the time but not the alarm
- No measuring distance given for the 300 lux figure
The HF3520 is the long-running Philips wake-up light, and on paper its light is close to the flagship. Philips’ own spec sheet lists 300 lux, 20 brightness settings and a sunrise you can set between 20 and 40 minutes, moving from red through orange to yellow. That range includes the 30-minute ramp used in the sleep inertia trials, and the peak is in the same range as the 250 lux dawns most studies used.
You also get a sunset mode, two alarms, 5 wake sounds, FM radio and tap-to-snooze. There is no app and no subscription. The clock display adjusts its own brightness.
The catch is where you buy it. Philips’ US product page shows no price or buy button, though Philips Canada still sells it and it remains in stock on Amazon US, where it had more than 14,000 ratings when we checked. That is why the buy link here goes to Amazon. Amazon’s review summary notes a split on controls: some owners find it easy to program, others call it too complicated.
Compared with the HF3650, you give up 10 lux of rated peak, the breathing wind-down, phone charging, two of the wake sounds and an alarm that survives a power cut. The HF3520’s backup only keeps the time for 4 to 8 hours. For most people those are fair trades for the price gap.
If you need a sunrise longer than 40 minutes, look at the Lumie Bodyclock Shine 300. If $107 is still too much, the JALL wake-up light costs about a third as much, but its brightness is unrated.
Sources
Head to head
Alternatives
- Best overallPhilips SmartSleep Sleep and Wake-Up Light (HF3650)$180
- Best for long sunrisesLumie Bodyclock Shine 300$169
- Lumie Bodyclock Luxe 700FM$259
- Best for sleep soundsHatch Restore 3$170