You should be ok. Light won't be your issue. I'd be mildly concerned about an infection, though. What is your garage like? If all was quiet there overnight, you probably won't have a problem. Keep in mind, a lot of breweries use open fermenters.
Brody's Brew House
Primary: Scottish Strong Ale
Seconary: Don't use one, generally
Kegged: Sweet Potato Saison
In the fridge: Czechvar, New Belgium sampler
Planned: Either a Porter or an AIPA. Possibly a RIS.
"For a quart of ale is a dish for a king." - Shakespeare