404. Gear Up And Solve This Not So Easy Riddle

RIDDLE 404:

I can be during the day and during the night. When applied to shape, I might give you a fright. As this type of power, some find me a shock. And for certain work, I require a clock; what am I?

There are subtle clues in the title and background photo.

OR Challenge Yourself With the Video Version that Features Multiple Choice Answers. You Get 10 Seconds to Solve!