Philips
Philips SmartSleep Wake-up Light HF3520/60
$108.99Cheaper
Best Sunrise Alarm Clocks · head-to-head
Philips SmartSleep Wake-up Light HF3520/60 vs Casper Glow Light
A sourced, side-by-side comparison. Philips SmartSleep Wake-up Light HF3520/60 is cheaper at $108.99. Every spec and price links to its source.
Casper
Casper Glow Light
$129
Which is better: the Philips SmartSleep Wake-up Light HF3520/60 or Casper Glow Light?
On the specs we track, they're closely matched. The Philips SmartSleep Wake-up Light HF3520/60 is the cheaper at $108.99.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Philips SmartSleep Wake-up Light HF3520/60 | Casper Glow Light |
|---|---|---|
| US price | $108.99 | $129 |
| Brand | Philips | Casper |
| Released | — | — |
| Max brightness lux | — | — |
| Sunrise duration adjustable | — | Yes |
| Sunset simulation | Yes | Yes |
| Sound options count | 5 | 0 |
| Fm radio | Yes | No |
| Color options | Red->orange->yellow sunrise progression (single warm-light spectrum, no discrete color choices) | 1 (2700K warm white / amber glow, no RGB) |
| Tap snooze | Yes | No |
| App control | No | Yes |
Sources — Philips SmartSleep Wake-up Light HF3520/60: usa.philips.com (verified 2026-08-16). Casper Glow Light: casper.com (verified 2026-08-16).
What's the difference between the Philips SmartSleep Wake-up Light HF3520/60 and Casper Glow Light?
Where the two actually differ on the specs we track (5 of 8). Matching specs are omitted.
- Sound options count: Philips SmartSleep Wake-up Light HF3520/60 5 vs Casper Glow Light 0
- Fm radio: Philips SmartSleep Wake-up Light HF3520/60 true vs Casper Glow Light false
- Color options: Philips SmartSleep Wake-up Light HF3520/60 Red->orange->yellow sunrise progression (single warm-light spectrum, no discrete color choices) vs Casper Glow Light 1 (2700K warm white / amber glow, no RGB)
- Tap snooze: Philips SmartSleep Wake-up Light HF3520/60 true vs Casper Glow Light false
- App control: Philips SmartSleep Wake-up Light HF3520/60 false vs Casper Glow Light true