The annual Light Up Louisville holiday celebration has begun.The event begins at 3:00 with a 5K walk/run. Live entertainment and activities for children will follow. A parade will begin at 6:00. The tree lighting is at 8:50.You can see a full schedule here.Next week, Metro Councilman David James, D-6, will hold the first "Light Up California" event at the California Leisure Park at the corner of Dixie Highway and Kentucky Street. You can get details here.