Projection

Source: Hayneedle 

If you are worried about not being able to see the numbers on your alarm clock, then your best bet is to buy one that will project the time onto the ceiling or wall of your room. This prevents you from having to roll over in the middle of the night and try to pinpoint your alarm clock’s location. When the numbers are projected onto your ceiling, you only have to look up and you will be able to instantly see the time.

This limits movement in the bed, allowing you to get back to sleep faster and prevent you from waking up anyone else in the bed. Additionally, since the numbers aren’t so bright that they will wake you up, you don’t have to worry about this type of alarm clock ruining your sleep.