Giants' Zito to light Union Square Christmas tree

San Francisco Giants starting pitcher Barry Zito throws to the plate during the first inning of a baseball game against the Los Angeles Dodgers, Thursday, April 16, 2009, in Los Angeles. (AP Photo/Mark J. Terrill)

November 27, 2009 10:02:32 AM PST

SAN FRANCISCO --

A Christmas tree with 21,000 low-energy lights will light up San Francisco's Union Square at 6:30 on Friday night.

Giants' pitcher Barry Zito is scheduled to flip the switch. For $5 you can sponsor a light to benefit UCSF Children's Hospital.

Proceeds go directly to a program that helps patients and their families get the very best medical care and emotional support. Donations will be accepted through December 24th.