| Brand | Philips |
| Model | Wake-up Light HF3521 | HF3521/01 |
| Product | light therapy |
| EAN | 0871010381807, 8710103818076, 8710103945369 |
| Language | English |
| Filetype | EN - 48 Manual (PDF), EN - 82 Manual (PDF), EN - 76 Manual (PDF), EN - 24 Manual (PDF), EN - 76 (PDF), EN - 48 (PDF) |
| Anti-slip rubber feet | Yes |
| Smartphone remote support | No |
| Cord length | 150 m |
| Display brightness control | Yes |
| Light intensity dimmer | Yes |
| Country of origin | China |
| Insulation | Class II |
| Protection class | III |
| Suitable for light type | Ambience |
| Weight | 1113 g |
| Power plug weight | 99 g |
| Height | 192 mm |
| Depth | 146 mm |
| Width | 199 mm |
| Sunset simulation | Yes |
| Sunrise simulation | Yes |
| Type | Wake-up light |
| Brightness settings | 20 |
| Light intensity | 300 lx |
| Sunrise simulating process (0-selected intensity) | 40 min |
| UV free | Yes |
| Replaceable lamp | - |
| Service life of lamp | - h |
| Number of brightness levels | 20 |
| Light color | Orange |
| Number of alarm times | 2 |
| Number of wake-up sounds | 6 |
| iPod/iPhone charge | No |
| Wake-up sounds | Yes |
| Snooze function | Yes |
| FM radio | Yes |
| Snooze button for sound and light | 9 min |
| Automatic brightness control | Yes |
| Power consumption (typical) | 16.5 W |
| AC input frequency | 50 - 60 Hz |
| AC input voltage | 100 - 240 V |
| AC adapter power | 12 W |
| Power | 16.5 W |