Welcome, Kramnuko --
I agree that the seedlings will probably be fine at the lower temp once they've germinated; but since you're doing this in the basement, I assume you're using some kind of setup with fluorescent lights? Be sure to keep the lights just a few inches away from the plants, leave them on for 14-16 hours a day, and if you can make some sort of enclosure the lights will raise the temp into a more favorable range. Once my seedlings have 2 sets of true leaves (or thereabouts) I start giving them a VERY dilute solution of Miracle Gro when I water them (sorry I can't give you an exact measurement, I just pretty much wing it to make a very light-blue solution) Hope you have a great gardening season!
