What else is important in my office?

Hint 1 of 5:

Did you turn on the lights?

Hint 2 of 5:

Find the switch next to your office door.

Hint 3 of 5:

Look up at the ceiling fixture.

Hint 4 of 5:

Get what is inside and take a look.

Hint 5 of 5:

Otherwise, search the desk drawers and the file cabinet (top and inside).