A Spooky Surprise :)

Riddle--don't we love a good one! And this one, this one comes with a surprise... solve the halloween mystery and receive 15% off your order. Ohhhh yes! 

 Riddle: 

I'm tall when I'm young, 

I'm short when I'm old.

And every Halloween, 

I bring the orange faces aglow. 

What am I? 

Enter the answer at checkout. Happy spooky season!