If my car is in the shop, then it’s up on stands. I also cover my tires while in the shop because my lighting is by fluorescent fixtures, along with several machine tools with electric motors. Here’s a quote from the Goodyear "Aircraft Tire and Maintenance" manual, page 12:
“Ideally, both new and retreaded tires and tubes should be stored in a cool, dry place out of direct sunlight. Temperatures should be between 32°F (0°C) and 85°F (30°C). Particular care should be taken to store tires away from fluorescent lights, electric motors, battery chargers, electric welding equipment, electric generators and similar equipment. These items create ozone, which has a deteriorating effect on rubber.”