I am definitely a night owl, just meaning I tend to stay up very late like now at almost 5am
Wow! You mean you enjoy the night life?
There's a lot less people to deal with and it's quiet but in several countries night owls are considered B rated. Whereas, early birds are A people
Yeah,I enjoy reading at night too, its calm and silent
The main difference between early birds and night owls is when they get their energy spark. We get it before bed
What do you mean by energy spark,is it lighting?
night owls may stay awake until just before or even after dawn. Night owls tend to feel most energetic just before they go to sleep at night. 
Some night owls have a preference or habit for staying up late, or stay up to work the night shift. Night owls who work the day shift often have difficulties adapting to standard daytime working hours.
Night owls have often been blamed for unpunctuality or attitude problems. Employers, however, have begun to learn to increase productivity by respecting body clocks through flexible working
Researchers traditionally use the terms "morningness" and "eveningness" for the two chronotypes or diurnality and nocturnality in animal behavior. In several countries, especially in Scandinavia, early birds are called "A-people" and night owls are called "B-people".
Etymology.
The term is derived from the primarily nocturnal habits of the owl. Most owls sleep during the day and hunt for food at night.
Characteristics.
Usually, people who are night owls stay awake past midnight, and extreme