Temps for seedlings

[asaump]

First time seed starter. I started my sweet peppers last week in my basement and they came up in 6 days. I started on a heat mat under a dome with temps about 80-85 degrees. I have now removed the dome and took them off the mat. They are under lights (LED - 6500k). The air temp hovers around 50 degrees in the basement. The LEDs do not seem to affect the air temp very much. Maybe a bit of heat just below the lights. My temp gauge sits on the shelf beside the flat. That is where I get the 50 reading from. Will these little guys survive in the colder temps until the basement warms up if/when spring gets here?