Moved seedling trays outdoors

[Goldie321]

Hi! First post here. I've moved my seedling trays outdoors on the deck out of direct sunlight - don't want them to cook in the Florida sun. Temps are staying in the 70s and actually hit 80 today. My concern is how cool is too cool for overnight? Our lows seem to be staying above 50 degrees lately but we are expecting a couple of nights with low 40s later this week.