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.
Two Kids Brewery
Primary: Amber Ale. :(
Seconary: Don't use one, generally
Kegged: Stein beer
Planned: Saison, pale ale, brown ale
"For a quart of ale is a dish for a king." - Shakespeare