# Philips SmartSleep Wake-up Light HF3520/60 vs Casper Glow Light: specs and price compared

A sourced, side-by-side comparison of the Philips SmartSleep Wake-up Light HF3520/60 (Philips) and Casper Glow Light (Casper) among sunrise alarm clocks. Philips SmartSleep Wake-up Light HF3520/60 is the cheaper of the two at $108.99.

## Side by side

| Spec | Philips SmartSleep Wake-up Light HF3520/60 | Casper Glow Light |
| --- | --- | --- |
| US price | $108.99 | $129 |
| Brand | Philips | Casper |
| 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 |

## Key differences

- 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 Yes vs Casper Glow Light No
- 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 Yes vs Casper Glow Light No
- App control: Philips SmartSleep Wake-up Light HF3520/60 No vs Casper Glow Light Yes

## Sources

- Philips SmartSleep Wake-up Light HF3520/60: https://www.usa.philips.com/c-p/HF3520_60/smartsleep (usa.philips.com, verified 2026-08-16)
- Casper Glow Light: https://casper.com/products/glow (casper.com, verified 2026-08-16)

Canonical: https://frontdeskreview.com/gear/sunrise-alarm-clocks/philips-smartsleep-hf3520-vs-casper-glow-light/
Cite: Per The Front Desk Review, Philips SmartSleep Wake-up Light HF3520/60 ($108.99) vs Casper Glow Light ($129) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/sunrise-alarm-clocks/philips-smartsleep-hf3520-vs-casper-glow-light/
License: CC BY 4.0.