Calgary Zoo staff putting finishing touches on 2022 Christmas light display

Gone are the days of unscrewing a dead bulb to replace one on a string of Christmas lights. The Wilder Institute/Calgary Zoo uses LED lights for its annual Zoolights display. It's hard to keep track of how many are used, but it's safe to say there are more than a million installed every year. Stefano Ferrara is a ZooReady technician who heads a team of anywhere from five to 10 dedicated staff to set up the lights. "It takes about three months to set them up and then it's three months to take the