Sunrise Alarm Clocks · Head-to-head
Philips HF3650/60 vs Philips HF3520/60
The short answer
Philips HF3520/60 comes out ahead overall with 7.4/10 against 7.2/10 for the Philips HF3650/60. Philips HF3650/60 is stronger on alarm & sound, features & versatility and reliability & build. Philips HF3520/60 is stronger on ease of use and value. At current verified prices, the Philips HF3520/60 costs about $75.00 less.
- Choose the Philips HF3650/60 if: Light sleepers who want RelaxBreathe guided breathing and a bright, app-free sunrise and sunset.
- Choose the Philips HF3520/60 if: Buyers who want a proven, app-free wake-up light with radio for about $110.
Scores by criterion
| Criterion | Philips HF3650/60 | Philips HF3520/60 |
|---|---|---|
| Sunrise light quality | 8.0650 lux at 1 ft, ~325 at 18 in, 5-40 min ramp (OYB) | 7.7570 lux at 1 ft, ~280 at 18 in, 20-40 min ramp (OYB); colored sunrise |
| Alarm & sound | 6.57 wake and 3 relaxation sounds plus FM; limited library | 6.0Only 5 nature sounds plus FM, no beep tones (Popular Science) |
| Ease of use | 7.5Easiest setup (Yahoo); unlabeled icon menu (OYB) | 8.0No app or Wi-Fi; simple controls and tap snooze |
| Features & versatility | 7.5RelaxBreathe, sunset, FM, AUX; no Bluetooth | 7.0Sunset, reading lamp, FM radio; no Bluetooth |
| Reliability & build | 7.52-year warranty and outage backup | 7.0Long-running model sold by Amazon; base is easy to knock over (This Old House) |
| Health & materials | 5.5OYB: flicker in the risky band | 5.5OYB: flicker in the IEEE 1789 risky band |
| Value | 6.0$179.99 is steep next to the HF3520 and Shine 300 | 8.5$108.99 sold by Amazon; the best brightness per dollar among measured lights, though the Dreamegg is cheaper |
Specifications
| Spec | Philips HF3650/60 | Philips HF3520/60 |
|---|---|---|
| Measured brightness at 18 in | 325 lux | 280 lux |
| Longest sunrise duration | 40 min | 40 min |
| Sunrise duration options | 5-40 min (Optimize Your Biology); Philips cites a 30-min default | 20-40 min in 5-min steps (Optimize Your Biology) |
| Sunset / wind-down light | Yes | Yes |
| Built-in sounds | 7 sounds | 5 sounds |
| FM radio | Yes | Yes |
| Bluetooth audio | No | No |
| App required for setup/core use | No | No |
| Subscription | None | None |
| Power source | Plug-in (8-hour power-outage alarm backup per Optimize Your Biology) | Plug-in (PowerBackUp+ per Walmart listing title) |
| Warranty | 2 years | — |
Philips HF3650/60
Pros
- Brighter than the HF3520
- RelaxBreathe guided breathing
- 8-hour power-outage alarm backup
- FM radio and AUX input
- 2-year warranty
Cons
- Icon-only menu
- Flicker in the risky band
- No Bluetooth
- Large footprint
- Costs $179.99
A good fit for light sleepers who want a guided wind-down without an app. Most buyers get more light for the money from the Shine 300.
Full Philips HF3650/60 review →Philips HF3520/60
Pros
- Brightness close to the Hatch's
- No app or subscription
- 20 to 40 minute sunrise plus sunset
- FM radio and tap snooze
- Mid-priced
Cons
- Only 5 nature sounds
- Flicker in the risky band
- Base is easy to knock over
- Large footprint
The best value here. The Dreamegg and Glow 150 cost less or about the same, but neither matches its measured brightness.
Full Philips HF3520/60 review →Both products are part of our guide The Best Sunrise Alarm Clocks of 2026, where you can see every pick, how we score and current prices from each retailer.