I’m the notes on the page; I am wedged in the door;
I’m the lights on the stage; I can tread on the floor;
I am paying the bill; I’m put down when at war;
I am three in the yard; but in these lines, I’m four.

Who am I?

UPDATE: Riddle solved by Rebecca. See comments for answer.

I’m a process that generates food from a light.
I am useful for plants who would reach a great height.
That is all I can mean, which brings with it a plight.
And so that’s why this riddle was tricky to write.

Who am I?

UPDATE: Riddle solved by Asher. See comments for answer.

I’m the total amassed when goods fly off the shelves;
I am simply disgusting; a full dozen twelves;
The degree their misconducts embarrass themselves;
And I’m (25) when, in this puzzle, one delves.

Who am I?

UPDATE: Riddle solved by Asher. See comments for answer.

I’m the horse of a legend; a cloud’s hopeful lining;
A second-place medal; though metal worth mining;
The twenty-fifth year; statistician divining;
A pirate from prose; or fine flatware for dining.

Who am I?

UPDATE: Riddle solved by Asher. See comments for answer.

I’m delivering blows with a sharp heavy blade;
I’m a writer who writes so he’ll quickly get paid;
I’m a license for cabbies to practice their trade;
And I’m breaching a server to alter your grade.

Who am I?

UPDATE: Riddle solved by Asher. See comments for answer.

I’m a barbed wire mesh, or a pickety white;
I can sell stolen goods so they won’t come to light;
Where you sit to decide you might not or you might;
And to sport with a mask and a sword used to fight.

Who am I?

UPDATE: Riddle solved by Asher. See comments for answer.

I’m a passageway trafficked with numerous feet;
A museum of fame; where conventioners greet;
I’m a juvenile jail; I’m where townspeople meet;
I’m where college kids live; or where soldiers can eat.

Who am I?

UPDATE: Riddle solved by Asher. See comments for answer.

I am found in a candle, or chewable lips;
I’m a document seal; a floor shine to cause slips;
The increasing of size in the moon’s monthly trips;
I’m expounding poetic; or body hair rips.

Who am I?

UPDATE: Riddle solved by Jason. See comments for answer.

I’m a small metal door fit with hinges and handles;
A logical circuit; a suffix for scandals;
A place to board flights; a high fence to block vandals;
I’m Heaven’s in film; and the Hell strait by Randall’s.

Who am I?

UPDATE: Riddle solved by Bronx Richie. See comments for answer.

I show multiplication, subtraction, addition;
A notice that gives or denies you permission;
Your own astrological predisposition;
And putting your name on a written petition.

Who am I?

UPDATE: Riddle solved by Asher. See comments for answer.