Being woken up by gradually increasing light is a far more pleasant experience than an annoying alarm clock. Smart light bulbs with some deft phone app management does this job well.
A slightly more straightforward example is the Philips Wake-Up Light Alarm Clock.
Boasting what it calls light therapy, this alarm clock features brightening and dining functions to ease the transition to and from sleep.
You can rest easy with this device.
Bricks and Bluebottles 
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