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: Pumpkin Saison; American Brown Ale(
Seconary: Don't use one, generally
Kegged: Pumpkin Porter
Planned: Either a Porter or a Scottish Strong Ale
"For a quart of ale is a dish for a king." - Shakespeare