Hardware Design Considerations for Wake-up Lights « joernesdohr.com
Amazon.com: PHILIPS SmartSleep Sleep and Wake-Up Light, Simulated Sunrise and Sunset, Multiple Lights and Sounds, RelaxBreathe to Sleep, HF3650/60 : Philips: Home & Kitchen
The Best Wake-Up Light Alarm Clocks | Reviews by Wirecutter
Philips HF3505 Wake-Up Light Review: A Basic Clock