# 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 wake up lights. Philips SmartSleep Wake-Up Light HF3520/60 is the cheaper of the two at $76.29.

## Side by side

| Spec | Philips SmartSleep Wake-Up Light HF3520/60 | Casper Glow Light |
| --- | --- | --- |
| US price | $76.29 | $129 |
| Brand | Philips | Casper |
| Max brightness lux | 300 | — |
| Color temperature range k | 1500–2800 K | 2700 K (fixed warm white, not color-changing) |
| Sunrise duration min | 30 | — |
| Sunset simulation | Yes | Yes |
| Alarm sound count | 5 | 0 |
| Fm radio | Yes | No |
| App control | No | Yes |
| Brightness levels | 20 | — |
| Bluetooth | No | Yes |

## Key differences

- Color temperature range k: Philips SmartSleep Wake-Up Light HF3520/60 1500–2800 K vs Casper Glow Light 2700 K (fixed warm white, not color-changing)
- Alarm sound 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
- App control: Philips SmartSleep Wake-Up Light HF3520/60 No vs Casper Glow Light Yes
- Bluetooth: 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 2026-08-01)
- Casper Glow Light: https://casper.com/products/glow (casper.com, verified 2026-08-01)

Canonical: https://frontdeskreview.com/gear/wake-up-lights/philips-smartsleep-hf3520-vs-casper-glow-light/
Cite: Per The Front Desk Review, Philips SmartSleep Wake-Up Light HF3520/60 ($76.29) vs Casper Glow Light ($129) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/wake-up-lights/philips-smartsleep-hf3520-vs-casper-glow-light/
License: CC BY 4.0.