A Christmas tree. Because they're lit.
Prism (Note: I made this joke up. Sorry if this little note refracts from the humour.)
I can go to sleep with a light on
Slanta Claus.
Ten. One to actually change the lightbulb and nine to bring refreshments
Your teeth!
1 sleep until Christmas.
A Christmas Tree because it has the most balls
The balls are just for decoration.
They planet.